Question

A car travels 20 km at a uniform speed of 20 km/ hr &next 20km at a uniform speed of 10km/hr. Find its average speed.

plz explain the answer step by step.

gave me the right answers
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Answer 1

Answer:

Time taken by the car to travel first 20km=20/40=1/2hrs.

Explanation:

above

Answer 2

Explanation:

average speed = total distance covered / total time taken

time taken first 20 km = 20km/20km/hr = 1 hr

time taken for next 20 km = 20/10km/hr = 2 hr

total time taken = 1+2 = 3 hours

total distance = 40 km

average speed = 40/3 km/hr

hope this will help you