Question

10 boys can dig a pitch in 12 hours. How long will 8 boys take to do it?

Options

• 9 h 36 min

• 15 h

• 6 h 40 min

• 13 h 20 min

Answer 1

15 h
Time is taken by 10 boys to dig a pitch = 12 hours
Time is taken by 1 boy to dig a pitch = 12 × 10 = 120 hours (less boys means more time)
Time is taken by 8 boys to dig a pitch = `120/8` = 15 hours