A) 12 min
B) 15 min
C) 25 min
D) 20 min
Correct Answer: D
Solution :
Part filled by A in 1 min \[=\frac{1}{30}\] part time by B in 1 min \[=\frac{1}{60},\] part filled by (A +B) in 1 min \[=\left( \frac{1}{30}+\frac{1}{60} \right)=\frac{3}{60}=\frac{1}{20}\] Both the pipes can fill the tank in 20 minutes.You need to login to perform this action.
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