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A drilling machine is used to drill a ho...

A drilling machine is used to drill a hole in a 10 kg metal block. Power of the drilling machine is 1 KW and it is used for 5 minutes. If 40% of the work done by the drilling machine is converted into heat in the metal block, the rise in its temperature is (Specific heat- 0.12 cal `gm^(-1).^(@)C^(-1)` and J=4.2 J/Cal)

A

`20^(@)C`

B

`25^(@)C`

C

`35^(@)C`

D

`50^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
B
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