An airplane travels five times as fast as a bus. If the bus covers 60 km in 80 minutes, then what distance (in km) will the airplane cover in 25 minutes?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 93.75.
Time taken by the bus = 80 minutes = 4/3 hours
Speed of the bus = 60/(4/3) = 45 km/h
Speed of the airplane = 5 × 45 = 225 km/h
Time taken by the airplane = 25 minutes = 5/12 hours
Distance covered by the airplane = 225(5/12) = 1125/12 = 93.75 km
Therefore, the airplane will cover 93.75 km in 25 minutes.