Home › CAT › quantitativeaptitude › Time, Speed and Distance › A bus travels equal distances at 40 km/h and 60 …
A bus travels equal distances at 40 km/h and 60 km/h. What is the average speed for the whole journey?
A$50$ km/h
B$45$ km/h
C$48$ km/h
D$52$ km/h
Answer & Solution
Correct answer: C. $48$ km/h
Equal-distance legs use harmonic mean: 2ab/(a+b) = 2 × 40 × 60 / (40+60) = 4800/100 = 48 km/h.
Related questions
Bishan cycled 120 km at a fixed speed. Had he cycled 3 km/hr slower, he would have taken 2Travelling at 54 km/h, Chaman reaches a place 3 minutes early. If he had travelled at 48 kA driver increases his speed by 25%. By what percentage does the journey time decrease (foPipe A fills a tank in 8 hours; Pipe B fills it in 12 hours. How long do both pipes take tA car that usually takes 6 hours for a trip now takes 4 hours due to a higher speed. By whA boat covers 24 km downstream in 2 hours and the same 24 km upstream in 3 hours. What is A 200-metre train at 36 km/h crosses a 100-metre platform. How long does it take?A 150-metre train at 54 km/h crosses a stationary pole. How long does it take?