A) 13 h 20 min
B) 11 h 15 min
C) 9 h 25 min
D) 15 h 25 min
Correct Answer: A
Solution :
Part filled by A in 1 h \[=\frac{1}{24},\]Part filled by B in 1 h \[=\frac{1}{30}\] Part filled by (A+B) in 1 h \[=\left( \frac{1}{24}+\frac{1}{30} \right)=\frac{9}{120}=\frac{3}{40}\] Time taken by both to fill the tank\[=\frac{40}{3}\text{h}\]= 13 h 20 minYou need to login to perform this action.
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