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  • Directions for question : The graph below shows the varying rate of flow of water (litres/min) through a pipe used to fill a reservoir : <img alt="" src="h

Directions for question :

The graph below shows the varying rate of flow of water (litres/min) through a pipe used to fill a reservoir :

Whenever the rate of flow of water changed it did so at a uniform rate, as is apparent from the graph. The reservoir was completely filled up from being empty in the above eight hours.

Question :

What is the average filling rate of water (in liters per hour) for the first three hours ?

Option: 1

700


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

best_answer

Correct Answer : 700

Volume of water filled in the first three hours 

= Area of region ABDFG

= Area of ABC + Area of CBDE + Area of EDFG

= (1/2)*20*60 + (1/2)*(10+20)*60 + 10*60

= 600 + 900 + 600

= 2100 litres

Hence, the average filling rate of water for the first three hours = 2100/3 = 700 litres per hour


 

Posted by

Ritika Harsh

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