Question

Pipe K fills a tank in 30 minutes. Pipe L can fill the same tank 5 times as fast as pipe K. If both the pipes were kept open when the tank is empty, how much time will it take for the tank to overflow ?
A) 3 minutes
B) 2 minutes
C) 4 minutes
D) 5 minutes

Answer 1

Q:

Pipe K fills a tank in 30 minutes. Pipe L can fill the same tank 5 times as fast as pipe K. If both the pipes were kept open when the tank is empty, how much time will it take for the tank to overflow ?

A) 3 minutes
B) 2 minutes
C) 4 minutes
D) 5 minutes

Answer:   D) 5 minutes 

Read Description:

Let the total capacity of tank be 90 liters.
Capacity of tank filled in 1 minute by K = 3 liters.
Capacity of tank filled in 1 minute by L = 15 liters.
Therefore, capacity of the tank filled by both K and L in 1 minute = 18 liters.

Hence, time taken by both the pipes to overflow the tank = 90/18 = 5 minutes.

Answer 2

Heyy mate ❤✌✌❤

Here's your Answer...

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Let the total capacity of tank be 90 liters.

Capacity of tank filled in 1 minute by K = 3 liters.

Capacity of tank filled in 1 minute by L = 15 liters.

Therefore, capacity of the tank filled by both K and L in 1 minute = 18 liters.

Hence, time taken by both the pipes to overflow the tank = 90/18 = 5 minutes.
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