Question

An aircraft travelling at 600 km/h accelerates steadily at 10 km/h per second. Taking the speed of sound as 10 km/h at the aircraft’s altitude, how long will it take to reach the ‘sound barrier’?

Answer 1

Speed of the aircraft= 600 km/h
speed of the sound = 10km/h
altitude= all the lines bisect each other at correct position
time take by the aircraft into sound barrier= 60÷600
= 10 hours

ANS= 10 Hours

Answer 2

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speed of sound = 1100 km/hr

v = u + a t

t = (v - u) / a = (1100 - 600 ) / 10 = 50 s

I hope, this will help you

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