Question

A man completes building a House in 5 days.... 3 men will complete building the house in..... Days.​

Answer 1

Answer:

If 10 workers need 3 days to build 1 house then 1 worker needs 3 x 10 = 30 days to build 1 house.

So rate of work is 1 house / 30 worker days effort

So with 15 workers you get this 30 worker days effort in 30/15 = 2 days

So 15 workers would need 2 days to build a house

At this rate, to build 4 houses 15 workers need 4 x 2 = 8 days.

But this is if life was only maths. In real life 15 workers may take more time than 10 workers due to other factors like relevant skill set & team coordination.

PS: hope that am not doing someone's homework here

Step-by-step explanation:

M1*D1*W2 = M2*D2*W1

10*3*4 = 15*x*1  

X = 30*4/15  

X = 8  

So 8 workers are required

Answer 2

time taken by a man to complete 1 building=5 days

rate of doing work by 1 man =1/5

So the time taken to complete 1 building by 3 workers is = 5/3 days