Question

Pipe 'R' and 'S' can fill a tank in 40 minutes and 1 hour respectively. 'R' is opened alone. After 16 minutes, 'R' is closed and 'S' is opened. Find the time taken by 'S' to fill the remaining tank.

A 30 minutes
B 32 minutes
C 36 minutes
D 40 minutes
E 44 minutes
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