Question

6. A body travels a distance of 10 km with a constant
speed of 30 km h-1 and then the next 40 km at a
constant speed of 50 km h-1. Find the average speed
for the whole journey.​

Answer 1

Answer:

10 km at 30 kph takes 20 minutes

40 km at 50 kph takes 48 minutes

Step-by-step explanation:

50 km has taken 68 minutes

Average speed is 50/68 km per minute = 0.7353 km per minute

Or multiply by 60 minutes to get 44.12 kph.

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MARK BRAINISH