Question

1
125 km out of a total distance of 1000 km of rail road track has to be
track is good?
60% of a group of 120 students who go on a picnic are girls. How m
A broker charges 3-% commission out of the total expenses, for ser
3
amount of 3750 what is the amount paid as commission?
33-% of 1236 is given as charity. How much is this amount ?
3
35% of a total weight of a cake is sugar. If the Cake weight is 2.25 k
A bonus of 2% of the annual salary of a person is declared for
month, what is his bonus amount ?
I throw a coin and record the number of times I get heads. If 35
get tails? How many tin​

Answer 1

Answer:

(a)

d

n

d=3+n

d=10

⇒

10

7

d+5

n+5

=

5

4

⇒5n+25=9d+20

5n+5=4d

5n+5=12+4n

n=7.

(b) m=4(s)

(m+16)=2(s+16)

⇒m+16=2s+32

4s+16=2s+32

2s=32

s=16

m=48

(c) G−VG=4

YG=4+B

YG+B=16

4+2B=16

2B=16

B=8

YG=12

G=16

(D) F+S=54

(F−6)=2+4(S−6)

F−6=2+4S−24

F=4S−16

4S−16+S=54

5S=70

S=14

F=40

(E) S=2A

A=5+S and y

sandy+S=16

Sandy +2A=16

Sandy +10+2 sandy=16

Sandy=2

S=14

A=7

(F) S=ut

v=50km/h =50×

18

5

t=12

S=50×

18

5

×12

S=

3

500

m

(G) 50 mens →5 days

1→

50

5

12500 mens →

50

5

×125

=12.5 day

(H) 5 girls →4

o

days

1→

50

40

80→

80

40

×80

=64

(I) S=ut=40×10=400

400=U×(8)

v=50km/h.