Question 1 of 51

Tap A took 20min to fill a pool to the brim. Tap B took 50min to fill the same pool to it’s brim. A was turned on for 10min and then turn off. How long did Tap B to fill the rest of the pool to the brim?

A
15min
B
20min
C
25min
D
30min
E
None of the above