A jet airplance travelling at the speed ...

A jet airplance travelling at the speed of ` 500 km ^(-1)` ejects its products of combustion at the speed of ` 1500 km h^(-1)` relative to the jet plane. What is the speed of the burnt gases with respect to observer on the ground ?

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The correct Answer is:

(i) 17.1 s (ii) 293.8 m

(i)

`2.1=(32-2.9)/t, t=29/2.1 cong 14 :. 14+3.3 cong 17`
(ii) Height `=52+1/2 [32+2.9]xx14=293.8`

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