alleryStart learning →A pipe fills a tank in 10 hours; a leak empties it in 15 hours. With both active, filling takes
A12.5 hours
B30 hours
C6 hours
D25 hours
Answer & Solution
Correct answer: B. 30 hours
Net rate is 1/10 - 1/15 = 1/30 per hour, so the tank fills in 30 hours.
Keep practising Ratio and Proportion, Indices and Logarithms
Browse all Ratio and Proportion, Indices and Logarithms questions for CA Foundation, or explore more Quantitative Aptitude topics.
Related questions
If log base x of 64 equals 3, then x equalsThe value of log base 5 of 125 plus log base 2 of 8 isFor positive a and b (not 1), (log base a of b) x (log base b of a) equalsLog of a product xy equalsIf log10 of an integer is 3.78, how many digits does it have?Who published the first set of base-10 logarithms in 1617?Who introduced logarithms in 1614?The base of the natural logarithm is approximately