Question

20 men requires 25 days to a trench 50 m long, 20 m broad and 1 m deep. How many days will be required for 60 men to dig a trench 90 m long , 60 m broad and 1/3 deep?

Answer 1

Answer:

M1T1/W1 = M2T2/W2

M1 = M2 as the number of persons are same,

Let the length of second trench be x

10/(100*50*10) = 30/(x*20*15)

1/5000 = 30/(300x) = 1/10x

x = 500

Length of second trench is 500 m