Question

Tap I can tell a tank in 10 hrs, tap 2 in 20hrs and tap 3 in 60
hrs if all the taps are open,in how many hours will the tank be filled?
3hrs
5hrs
7 hrs
6hrs​

Answer 1

Answer:

$tap1 = 10hrs \\ tap2 = 20hrs \\ tap3 = 60hrs \\ lcm = 60 \\ tap1 \: s \: 1 \: day \: work = 6 \\ tap2 \: s \: 1 \: day \: work = 3 \\ tap3 \: s \: 1 \: day \: work = 1 \\ total = 10 \\ days \: taken \: to \: complete \: the \: work = \frac{60}{10} \\ = 6 \: days$