Two tourist A and B who are at a distance of40 km from their camp must reach it together inthe shortest possible time. They have one bicycleand they decide to use it in turn. 'A' startedwalking at a speed of 5 km hr and B moved onthe bicycle at a speed of 15 km hr. After movingcertain distance B left the bicycle and walkedthe remaining distance. A, on reaching near thebicycle, picks it up and covers the remainingdistance riding it. Both reached the camp together.(a) Find the average speed of each tourist.(b) How long was the bicycle left unused?

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Answered: Two tourist A and B who are at a…

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