Explanation

Let the height of the building be x meters.

Less lengthy shadow, Less in the height (Direct Proportion)

∴ 40.25 : 28.75 :: 17.5 : x ⇔ 40.25 × x = 28.75 × 17.5

Explanation

Explanation

1/240 * n * 4 = 6 becomes:

1/240 * 360 * 4 = 6

we simplify to get:

6 = 6 confirming that our calculation of the number of people required is good.

the answer is that it would require 360 men to fill 6 holes in 4 months.

Explanation

If 40 men can build 4 buildings in 12 months we can divide 4/12 which is 1/3..

40*3 is 120 men for 4 buildings and 120 is divided into 4 we get 30 men for 1 building..

so for buildings 30*2 = 60   

 120+60 is = 180

Explanation

Find how many man-days to complete the road:

70*35 = 2450 man-days

Let d = days required for 40 men to do it.

40d = 2450

d=402450​=61.25