Heya ^_^
My dear friends..
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Please help me
Please slove all the questions please!!
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Answers
Here is your solution :
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1.
As,30 men can do 1/7 part of work in 2 days.
So, 1 man will do 1 work in ( 2 × 7 × 30 ) days
= 420 days
As, 1 man can do a work in 420 days.
So, 21 men will do it in ( 420 ÷ 21 ) days
= 20 days.
Ans : 20 days
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2.
Given,
10 men = 18 women
1 man = ( 18/10 ) women
6 men = ( 18 × 6 / 10 ) women
6 men = 10.8 women.
Now,
= 6 men + 12 women
= ( 10.8 + 12 ) women
= 22.8 women
Now,
As, 18 women can do a job in 38 days.
So, 1 woman will do it in ( 38 × 18 ) days.
= 684 days
So, 22.8 women will do it in ( 684 / 22.8 ) days
= 30 days
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3.
As, 1 week = 7 days
So, 5 weeks = ( 7 × 5 ) days = 35 days
As, in 1 day Arun walks 226 m.
So, in 35 days he will walk ( 226×35 ) m
=7,910 m
As, 1,000 m = 1 km
So, 1 m = ( 1 ÷ 1000 ) km
So, 7,910 m = ( 7,910 ÷ 1,000 ) km
= 7.91 km
Ans : 7.91 km
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4. 15 1/3 = 46/3.
As, in ( 2/3 )hours he makes 1 toy.
So, in 1 h , he will make ( 3/2 ) toys.
So, in ( 46/3 ) h , he will make ( 3× 46 ) ÷ ( 3 × 2 ) toys
= 23 toys.
Ans : 23 toys
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5.
Suppose, N stands for Neetu and M for Meenu.
Now,
In 10 days , ( N + M ) can do a work.
So, in 1 day , ( N + M ) will do ( 1/10 ) work.
Now,
As, in 12 days N can do that work.
So, in 1 day N will do ( 1/12 ) work.
Again,
N + M = 1/10 work
( 1/12 ) work + M = 1/10 work
M = { ( 1/10 ) - ( 1/12 ) } work
M = ( 6 - 5 )/60 work
M = ( 1/60 ) work
As, M can do 1/60 work in 1 day.
So, M will do 1 work in 60 days.
Ans : 60 days
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6.
As,in ( 8 × 10 )h , 24 workers can do a work.
So, in 1 h , 24 workers in will do ( 1/80 ) work.
So, in 60 h, 24 workers will do ( 60/80 ) work.
= ( 3/4 ) work.
As , ( 3/4 ) work is done by 24 workers in 60h.
So, 1 work willl be done by ( 24 × 4 ÷ 3 ) workers in 60h.
= 32 workers
Ans : 32 workers.
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7.
As, in 14 days both can do 1 work.
So, in 1 day both will do ( 1/14 ) work.
Now,
Let , Sambhavi can do that job in x.
So, Sandhya will do that job in 2x.
Work done by Sambhavi in 1 day = 1/x
Work done by Sandhya in 1 day =1/2x
Now,
( 1/x ) + ( 1/2x ) = 1/14
( 2+ 1 ) / 2x = 1/14
3/2x = 1/14
2x = 14 × 3
x = ( 14 × 3 ) ÷ 2
x = 21 days.
Sandhya = 2x = 2 × 21 days = 42 days.
Ans : 42 days.
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8.
As there was enough food for 200 soldiers for 31 days .
So, after 27 days also there was enough food for soldiers for 4 days.
Now, 120 soldiers left the group.
Remaining soldiers = 200 - 120 = 80.
As 200 soldiers had food for 4 days.
So, 1 soldier will have food for 200 × 4 days.
So,80 soldiers will have food for 800÷80 days
= 10 days
Extra days = ( 10 - 4 ) days = 6 days.
Ans : 6 days.
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9. Work done by A in 1 day = 1/24
Work done by B in 1 day = 1/30
Work done by A + B + C in 1 day = 1/12
A + B + C = A + B + C
( 1/24 ) + ( 1/30 ) + C = 1/12
C = { ( 1/12 ) - ( 1/24 ) - ( 1/30 ) }
C = ( 10 - 5 - 4 ) / 120
C = 1/120
As C can do 1/120 work in 1 day.
So,C will do 1 work in 120 days.
Work done by A in 12 days = 12/24 = 1/2
Work done by B in 12 days = 12/30 = 2/5
Work done by C in 12 days = 12/120 = 1/10
A's share = Rs.5000 ÷ 2 = Rs.2,500
B's share = ( Rs.5000 × 2 )÷ 5 = Rs.2,000
C's share = ( Rs.5000 ÷ 10 ) = Rs.500
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Hope it helps !!
Answer:
Heya Sapna di,
Here is your solution :
====================================
1.
As,30 men can do 1/7 part of work in 2 days.
So, 1 man will do 1 work in ( 2 × 7 × 30 ) days
= 420 days
As, 1 man can do a work in 420 days.
So, 21 men will do it in ( 420 ÷ 21 ) days
= 20 days.
Ans : 20 days
______________________________
2.
Given,
10 men = 18 women
1 man = ( 18/10 ) women
6 men = ( 18 × 6 / 10 ) women
6 men = 10.8 women.
Now,
= 6 men + 12 women
= ( 10.8 + 12 ) women
= 22.8 women
Now,
As, 18 women can do a job in 38 days.
So, 1 woman will do it in ( 38 × 18 ) days.
= 684 days
So, 22.8 women will do it in ( 684 / 22.8 ) days
= 30 days
_________________
3.
As, 1 week = 7 days
So, 5 weeks = ( 7 × 5 ) days = 35 days
As, in 1 day Arun walks 226 m.
So, in 35 days he will walk ( 226×35 ) m
=7,910 m
As, 1,000 m = 1 km
So, 1 m = ( 1 ÷ 1000 ) km
So, 7,910 m = ( 7,910 ÷ 1,000 ) km
= 7.91 km
Ans : 7.91 km
______________________________
4. 15 1/3 = 46/3.
As, in ( 2/3 )hours he makes 1 toy.
So, in 1 h , he will make ( 3/2 ) toys.
So, in ( 46/3 ) h , he will make ( 3× 46 ) ÷ ( 3 × 2 ) toys
= 23 toys.
Ans : 23 toys
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5.
Suppose, N stands for Neetu and M for Meenu.
Now,
In 10 days , ( N + M ) can do a work.
So, in 1 day , ( N + M ) will do ( 1/10 ) work.
Now,
As, in 12 days N can do that work.
So, in 1 day N will do ( 1/12 ) work.
Again,
N + M = 1/10 work
( 1/12 ) work + M = 1/10 work
M = { ( 1/10 ) - ( 1/12 ) } work
M = ( 6 - 5 )/60 work
M = ( 1/60 ) work
As, M can do 1/60 work in 1 day.
So, M will do 1 work in 60 days.
Ans : 60 days
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6.
As,in ( 8 × 10 )h , 24 workers can do a work.
So, in 1 h , 24 workers in will do ( 1/80 ) work.
So, in 60 h, 24 workers will do ( 60/80 ) work.
= ( 3/4 ) work.
As , ( 3/4 ) work is done by 24 workers in 60h.
So, 1 work willl be done by ( 24 × 4 ÷ 3 ) workers in 60h.
= 32 workers
Ans : 32 workers.
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7.
As, in 14 days both can do 1 work.
So, in 1 day both will do ( 1/14 ) work.
Now,
Let , Sambhavi can do that job in x.
So, Sandhya will do that job in 2x.
Work done by Sambhavi in 1 day = 1/x
Work done by Sandhya in 1 day =1/2x
Now,
( 1/x ) + ( 1/2x ) = 1/14
( 2+ 1 ) / 2x = 1/14
3/2x = 1/14
2x = 14 × 3
x = ( 14 × 3 ) ÷ 2
x = 21 days.
Sandhya = 2x = 2 × 21 days = 42 days.
Ans : 42 days.
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8.
As there was enough food for 200 soldiers for 31 days .
So, after 27 days also there was enough food for soldiers for 4 days.
Now, 120 soldiers left the group.
Remaining soldiers = 200 - 120 = 80.
As 200 soldiers had food for 4 days.
So, 1 soldier will have food for 200 × 4 days.
So,80 soldiers will have food for 800÷80 days
= 10 days
Extra days = ( 10 - 4 ) days = 6 days.
Ans : 6 days.
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9. Work done by A in 1 day = 1/24
Work done by B in 1 day = 1/30
Work done by A + B + C in 1 day = 1/12
A + B + C = A + B + C
( 1/24 ) + ( 1/30 ) + C = 1/12
C = { ( 1/12 ) - ( 1/24 ) - ( 1/30 ) }
C = ( 10 - 5 - 4 ) / 120
C = 1/120
As C can do 1/120 work in 1 day.
So,C will do 1 work in 120 days.
Work done by A in 12 days = 12/24 = 1/2
Work done by B in 12 days = 12/30 = 2/5
Work done by C in 12 days = 12/120 = 1/10
A's share = Rs.5000 ÷ 2 = Rs.2,500
B's share = ( Rs.5000 × 2 )÷ 5 = Rs.2,000
C's share = ( Rs.5000 ÷ 10 ) = Rs.500
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Hope it helps !!