Aptitude - Question 19

+3 votes
Three pipes A,B and C can fill a tank from empty to full in 30 minutes, 20 minutes 
and 10 minutes respectively. When the tank is empty, all the three pipes are opened. 
A, B and C discharge chemical solutions P, Q and R respectively.
 What is the proportion of solution R in the liquid in the tank after 3 minutes?

(A) 5/11 
(B) 6/11
(C) 7/11 
(D) 8/11
asked May 10 in Aptitude by getgatebook (31,550 points)
reshown May 11 by getgatebook

1 Answer

+5 votes
 
Best answer
A finish in 30 min

B finish in 20 min

C can finish in 10 min

Total capacity can be assumed to be lcm (30,20,10) that is 60.

A discharge  60 /30 i.e. 2 unit of P in 1 minutes

B discharge 60/20  i.e. 3 unit of Q in 1 minutes.

C discharges 60/10 6 unit of R in 1 minutes .

All worked for 3 minutes ,proportion of R in solution is

6*3/(2*3 +3*3 +2*3)==6/11
answered May 11 by tsankitjha910 (3,650 points)
selected May 11 by getgatebook
please correct the solution in the denominator for c it should be 6*3 not 2*3
Answer:
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