Question

50 labourers can dig a pond in 16 days how many labourers will be required to dig another pond double in size in 20 days

Answer 1

work done by 1labourer = 16/50= 8/25
let number of labourers required be x
 so                          20=x*8/25
                                x=20×25/8
                                x=125/2=62.5
therefore your answer is 62.5