IBPS RRB Office Assistant 2019 Paper

Let, the capacity of tank be 180 units
because LCM (36, 60) = 180
Efficiency of tap A = 5 units/minute
Efficiency of tap B = 3 units/minute  

1

6

th capacity of tank =

1

6

×180 =30 units
∴ The required time taken =

30

5+3

=3

3

4

‌min