Question

Can u plz help me with this question no.12 step by step

Answer 1

Step-by-step explanation:

Time taken by a pipe A to fill an empty tank = 6 hours

Time taken by a pipe B to fill an empty tank = 4 hours

Time taken by pipe A to fill an empty tank in 1 hour = 1/6 part.

Time taken by pipe B to fill an empty tank in 1 hour = 1/4 part

Together can they fill an empty tank in 1 hour =

(1/6 + 1/4) = 5 /12 part

Therefore, together they can fill an empty tank completely = (1 ÷ 5/12) = 12/5 hours = 2 hours 40 minutes