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When Sound is produced in an aeroplane moving with a velocity of 200m/s horizontally. Its echo is heard after 10 * SQRT(5) seconds. If the velocity of sound in air is 300m/s. The elevation of aeroplane is :- a) 1250 metre b) 250 mt c) 250 * SQRT(5) metre.

Ashish , 7 Years ago
Grade 12
anser 2 Answers
Saurabh Koranglekar

Last Activity: 5 Years ago

576-219_1.PNG

Arun

Last Activity: 5 Years ago

Dear student
 

2d = v*t 

d = 300* 10√5 / 2

= 200 * 10√5 

= 2000√5 seconds

 

Hope it helps

 

Thanks and regards

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