If 25 workers can build a wall in 10 days, how many days will it take for 20 workers to build a similar wall?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 25/2 days.
For m1 and m2 workers in doing a work the equation for number of days d1 and d2 can be given as,
m1d1 = m2d2
According to the given question,
⇒ 25 × 10 = 20 × d2
⇒ d2 = 25/2
Hence the time taken by 20 workers to build the wall is 25/2 days.