TS ICET 2017 Question Paper with Solutions for online practice

Question : 97 of 200

Marks: +1, -0

Two taps P and Q can fill an empty tank respectively in 30 minutes and 50 minutes independently. P is opened for 6 minutes and then opened the tap Q. The time taken to till the tank (in minutes) is

Validate

Solution:

Part of tank filled by P in 6 minutes

=1-1/5=4/5

Part of tank filled by (P + Q) in 1 minute

=1/30+1/50={5+3}/150=8/150=4/75

∴ Time taken to fill the empty

4/5

tank

={4{/}5}/{4{/}75}=75/5=15

minute
∴ total time

=6+15=21

minutes.

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