Question

if 5 men build house 28 days in how day 7 men build?​

Answer 1

Given:

if 5 men build house 28 days in how many days 7 men build?​

To find:

The required answer.

Solution:

It is given that 5 men build the house in 28 days.

So, when 7 men build the same house it will take fewer days.

The Number of days will take to build the house in 7 days:

$=> \dfrac{5 \times 28}{7}$

$=>\dfrac{140}{7}$

$=> 20$

Therefore 7 men can build the house in 20 days.

Hence, it will take 20 days to build the house by 7 men

Answer 2

Given :  5 men build house in 28 days

To Find :  in how day 7 men build?​

Solution:

5 men build house in 28 days

Hence total work done = 5 * 28  = 140  Man days

Let say 7 man completed work in D days

=> Total work done = 7D  man Days

Equate both

=> 7D  = 140

=> D = 20

Hence 7 men build the same house in 20 days

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