Question
A cistern is normally filled in 18 hours, but it takes
12 hours longer to fill because of a leak at its bottom. If the cistern is full, how long will it take to empty it?Solution
Let pipe is A and leak is B Â Â AÂ Â Â Â Â Â Â Â Â Â Â Â Â A+B Â Â 18Â Â Â Â Â Â Â Â Â Â Â Â Â Â 30 Let total tank = LCM(18,30) = 90 L Â 5Â Â Â Â Â Â Â :Â Â Â Â Â Â Â Â Â Â 3 So 1 hr work of leak = 3 - 5 = -2 Therefore, the leak will drain all the water of the tank in 90/2 = 45 hours.
More Uniatry Method Questions
- A series is given with one term missing. Choose the correct alternatives from the given ones that will complete the series.
57, 59, 56, 61, 54, ___ - Which letter and number cluster will replace the question mark (?) to complete the given series?
LT6, KU12, IW24, FZ48, ____ - Select the number from among the given options that can replace the question mark (?) in the following series.
17, 18, 22, 31, 47, ___ - Which letter-cluster will replace the question mark (?) in the following series?
NPQR, OORQ, PNSP, ____, RLUN - Which letter-cluster will replace the question mark (?) in the following series?
RGV, UME, ?, AYW, DEF
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