Question

• 10 masons can build a wall working 7 hours a day, in 12 days. In how many days can the work be
completed by 14 persons working 8 hours a day?
​

Answer 1

Answer:

A common sense way of solving this problem is

to first find the total number of hours taken by

10 masons working for 7 hours a day for 12 days

to build the wall.

= 10 masons x 7 hours/day x 12 days = 840

hours (total time taken to build the wall)

Now, assume that the number of days required

to build the wall by 14 masons working 8 hours

a day be y.

Using same common sense approach as

above, we get

14 masons x 8 hours/day x y = 840

.'. 112 x y = 840

%3D

.'. y = 840 ÷ 112 = 7.5 days

%3D