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The coefficient of linear expansion of s...

The coefficient of linear expansion of steel and brass are `11 xx 10^-6//^@ C` and `19 xx 10^-6// ^@ C`, respectively. If their difference in lengths at all temperature has to kept constant at `30 cm`, their lengths at `0^@ C` should be

A

71.25cm and 41.25cm

B

82 cm and 52 cm

C

92 cm and 62 cm

D

62.25 cm and 32.25 cm

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The correct Answer is:
A
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