Question

A train has a speed of 60 km/h. for the first one hour and 40 km/h for the next half hour. Its average speed in km/h is

• A. 50
• B. 53.33
• C. 48
• D. 70

Answer 1

Answer: (B)

53.33

Answer 2

Distance travelled by train in first 1 hour is 60 km and distance in next 1/2 hour is 20 km.

So Average speed$= \frac { \text { Total distance } } { \text { Total time } } = \frac { 60 + 20 } { 3 / 2 }$