A) 20 min
B) 30 min
C) 40 min
D) 45 min
E) Other than those given as options
Correct Answer: A
Solution :
Let the capacity of tank be 60 lit (LCM of 30 & 60) Tap A can empty \[=\frac{60}{60}=1\] lit/m Tap B can empty \[\frac{60}{30}=2\] lit/m Now, Tap (A + B) can empty the tank in\[\left( \frac{60}{1+2}= \right)\frac{60}{3}=20\]minutesYou need to login to perform this action.
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