Question

A tank is to be filled completely with water for which 8 pipes of the same kind are used. The tank gets filled in l hour and 40 minutes. If 10 pipes of the same kind, as mentioned above, are used, in how much time (in hours and minutes) will the tank be completely filled?

Options

• 1 hour 30 minutes

• 1 hour 45 minutes

• 2 hour 5 minutes

• 1 hour 20 minutes

Answer 1

1 hour 20 minutes

Explanation:

8 pipes filled in 1 h 40 min.

∴ 10 pipes filled in = `(8 xx (1 + 2/3))/10 = (8 xx 5)/(3 xx 10) = 4/3` = 1 hour 20 min.