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Q.

The length of a metal rod at 0°C is 0.5m.When it is heated, its length increases by 2.7mm. The final temperature of rod is (coeff. of linear expansion of metal = 90 × 10-6/°C)

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An Intiative by Sri Chaitanya

a

20°C

b

30°C

c

40°C

d

60°C

answer is D.

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t2−t1=l2−l1l1a

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