Question

Questions no. 1
27 men complete 1/6 of a job in 20 days. how many more men will be needed to complete the job in 90 days? write the moral value learnt from this.

Questions no. 2
Find the change in a number which is first increased by 20% and then decreased by 20%.

Questions no. 3
how old is a man whose age fifteen years ago was two fifths of what it will be in 6 years?

please help me tomorrow is my exam.!

Answer 1

Qn1) Im not sure therefore I don't know
Qn2)
Increased by 20%:
Original number=100%
20% of 100%=20%
100%+20%=120%
.
Decreased by 20%:
New number=120%
20% of 120%=24%
120%-24%=96%

Qn3)
If her current age is X.

Age 15 years ago: X-15

Age 15 years hence: X+15

Acc. to the problem,

X-15 = 2/5(X+15)

5 (X-15) = 2(X+15)

5X - 75 = 2X + 30

5X - 2X + 30 + 75

3X = 105

X = 105/3

= 35.