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Question

5 masons built a wall in 2 days. If the wall was to be built in a single day, then how many masons should be employed?
  1. 12 masons
  2. 8 masons
  3. 10 masons
  4. 9 masons


Solution

The correct option is C 10 masons
Given,
A wall is built in 2 days by 5 masons.

We know that the lesser the number of days to build, more will be the number of masons required.

So, Number of days(x)         1Number of masons(y)

x1x2 = y2y1

Given,
x1 = 2 days
y1 = 5 masons
x2 = 1 day
and y2 = number of masons required

21=y25
 y2 = 2 × 51 = 10 masons

10 masons should be employed to build a wall in a single day.

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