Question

Solve any two questions step by step and the best answer will marked as brainliest and also will get ratings & thanks ​​
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The answers are....
12) Rohan 16 years; Sohan 20 years
13) 5/7
14) 15 CM, 10 cm
15) 25
16) 2-rupee coins : 36, 5-rupee coins 12
17) ₹ 48000
18) 42
19) 35​

Answer 1

Answer:

12) let their ages be x

present ages:- 4x,5x

four year hence the ages will be:-

5x,6x

Acc. to the ques:-

4x+4=5x ; 5x+4= 6x

solve the eq.

x= 4

present ages:-

4×4=16 ,5×4= 20.

13) let the numerator be x

then denominator will be x+2( acc to the ques)

obtaining equation:-

x/x+2+3=1/2

simplifying it.

x/x+5=1/2

cross multiplication

2x= x+5

x=5(numerator obtained)

denominator will be x+2 i.e 7

fraction obtained= 5/7

14) let the breadth be xcm

then length= x+5cm

perimeter of rect.=50

2(l+b) = 50

2(x+5+x)= 50

2(2x+5)=50

4x+10=50

4x=40

x=10( breadth)

x+5= 15( length)

16)let the property of the man be x

acc to the ques

1/3x+1/4x+20000=x

taking LCM of 3,4=12

4x+3x+240000/12=x

7x+240000/12=x

cross multiplication

7x+240000= 12x

5x=240000

x=48000rupees.