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Question: The absolute temperature of air in a region linearly increases from 0<sup>0</sup>C to 819<sup>0</sup...

The absolute temperature of air in a region linearly increases from 00C to 8190C in a space of width 'd'. Time taken by sound wave to travel through this space is: [Velocity of sound at 00C is v0]

A

2d5v\frac{2d}{\sqrt{5}v}

B

6dv\frac{6d}{v}

C

2d3v\frac{2d}{3v}

D

None of these

Answer

2d5v\frac{2d}{\sqrt{5}v}

Explanation

Solution

l1 + e = λ4\frac { \lambda } { 4 }

l2 + e = 3λ4\frac { 3 \lambda } { 4 }

l2 + e = 3(l1 + e)

l2 = 3l1 + 2e