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An aeroplane flies with an average speed of 756 km/h . A helicopter takes 48 h to cover twice the distance covered by aeroplane in 9 h . How much distance will the helicopter cover in 18 h ? (Assuming that flights are non-stop and moving with uniform speed)
A. 5010 km
B. 4875 km
C. 5760 km
D. 5103 km

1 Answer

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Best answer
Correct Answer - D
Distance covered by the aeroplane in 9 h
= `9 xx 756 = 6804` km
Speed of helicopter = `(2 xx 6804)/(48) = 283.5 ` km/h
`therefore` Distance covered by helicopter in 18 h
`283.5 xx 18 = 5103` km

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