4 years ago

5 points

1 answer:

4 0

Answer: 72km/hr

Explanation:

First let’s find the distance:

d = 42 x 4 = 168

Use the formula to find the average speed: v = d/t

V = 168/2 1/3hr (1/3hr = 20mins)

V = 168 divide by 7/3 (2 1/3 = 7/3)

V = 168 x 3/7

V = 72

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