Question

250 men can finish a work in 20 days working 5 hours a day. To finish the work within 10 days working 8 hours a day, the minimum number of men required is-
A) 310
B) 300
C) 313
D) 312

Answer 1

the answer is 310 I think so...

Answer 2

given,
250 men works 20 days about 5 hours to finish a work..
total time taken to finish the work = 250*5*20=25000 hours
if they work 8 hours a day for 10 day ...
required men(x) will be = 8*10*x=25000
X=25000/80
X=312....