Question

a car travels 30 km at a uniform speed of 40km/h and the next 30km at uniform speed if 20km /h . find the average speed.

Answer 1

Explanation:

Total distance covered=30+30=60 km

total time taken=[30/40+30/20] hour

30/40(1+2)hour=3/4×3hour

Average speed= 60km/(9/4)hour = 60×4/9 km/h

=80/3km/h.

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