Question

15.
30 men can build a wall in 50 days. How many more men are required to build another wall, double
in size, in 75 days?​

Answer 1

Answer:

10 more men

Step-by-step explanation:

Given,

30 men can build a wall in 50 days.

We know,

work=men*hours*days

1 work=30 men*50 days

How many more men are required to build another wall, double

in size, in 75 days?​

let x be more men

then men=(30+x) to build double the wall in 75 days

if 1st wall is w, double the wall is 2w

w=30 men*50 days     ---(1)

2w=(30+x)*75 days      ----(2)

Eq(1) divided by (2)

w/2w=(30*50)/(30+x)*75

x=10