Question
An empty tank can be filled by an inlet pipe in 10
hours, while an outlet pipe can empty it in 15 hours. If we open (N - 1) outlet pipes of the same capacity and (N + 1) inlet pipes also of the same capacity, the tank is filled in 3 hours. Determine the number of inlet pipes used.Solution
Let the capacity of tank be 30 litres (LCM of 10 and 15) Efficiency of 1 inlet pipe = (30/10) = 3 units/litre Efficiency of 1 outlet pipe = (30/15) = 2 units/litre ATQ, {3 X (N + 1) - 2 X (N - 1) } X 3 = 30 Or, (3N + 3 - 2N + 2) X 3 = 30 Or, N + 5 = 10 So, 'N' = 5 Required number of inlet pipes used = (n + 1) = 5 + 1 = 6
Select the most appropriate meaning of the given idiom.
      In the pinkÂ
Though the International Cricket Council’s anti-corruption unit ……. become more vigilant over the years, it cannot sub...
select the most appropriate word to fill in the blank.
All his endeavours to win his match proved ……and did not bring the desired results . ...
Some among those who probed the case …….. that moving the league to a new country could ……. exposing it...
Select the word which means the same as the group of words given
That which cannot be satisfiedÂ
select the segment which contains error in the given sentence .
The boys whom I have invited have come are my friends .
find the same meaning pairÂ
The CRR cut will only benefit the banks and not the industry, which is suffering of high interest rates and slow demand.
...The IIT council has already given in principal approval to the Kakodkar Committee’s recommendations to be implemented from 2013.
...Read each sentence to find out whether there is any error in it. The error, if any, will be in one part of the sentence. Mark the part with the error as...
Relevant for Exams:
