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An iron ball of diameter 6cm and is 0.01...

An iron ball of diameter 6cm and is 0.01 mm too large to pass through a hole in a brass plate when the ball and plate are at a temperature of `20^(@) C`. The temperature at which (both for ball and plate) the ball just pass through the hole is `(alpha_("iron") = 12 xx 10^(-6) //1^(@) C, alpha_("brass") = 18 xx 10^(-6) //1^(@) C)`

A

`68^(@) C`

B

`48^(@) C`

C

`28^(@) C`

D

`40^(@) C`

Text Solution

Verified by Experts

The correct Answer is:
B
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