A bicyclist is travelling along a straight road for half the time with speed v1 and for the next half of the time with speed v2. What is the average speed of the cyclist ?
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Answer:
(v1 + v2 ) ÷ 2
Explanation:
average speed = total distance ÷ total time
= (v1t + v2t) ÷ 2t
= (v1 + v2 ) ÷ 2
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