Question

14 workers can build a wall in 42 days. One worker can build it in 

A. 3 days 

B. 147 days 

C. 294 days 

D. 588 days

Answer 1

It is an inverse proportion. 

If 14 workers can do it in 42 days. 

Then time taken by 1 worker = 14 × 42 = 588 days