RRB Group D Model Paper 10 with solutions

Question : 79 of 100

Marks: +1, -0

Water is dripping at a certain rate from a container. If the level (L cm) of the water in the container is given by the equation L = 2 –

2^t

, where t is time taken (in hours), then the level of water in the container at the start is

Solution:

(2) Level of water
L = 2 –

2^t

At start, t = 0, so,
L = 2 –

2^0

= 2 - 1 = 1 cm

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