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There is a rectangular metal plate in wh...

There is a rectangular metal plate in which two cavities in the shape of rectangle and circle are made, as shown with dimensions. `P` and `Q` are the centres of these cavities. On heating the plate, which of the following quantities increases?

A

`pi r^2`

B

`ab`

C

`R`

D

`b`

Text Solution

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The correct Answer is:
A, B, C, D
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