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A wooden block, with a coin placed on it...

A wooden block, with a coin placed on its top, floats in water as shown in figure. The distance l and h are shown here. After some time the coin falls into water. Then

A

`l` decreases and `h` increases

B

`l` increases and `h` decreases

C

both `l` and `h` increase

D

both `l` and `h` decrease

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The correct Answer is:
D
When coin sinks in liquid, it will displace less volume of water, level will fall i.e., `h` decreases.
When no coin, less weight and hence upthrust decreases, so `l` decreases.
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