A, B & C are on a trip by a car. A drives during the first hour at an average speed of 50 km/hr. B drives during the next 2 hours at an average speed of 48 km/hr. C drives for the next 3 hours at an average speed of 52 km/hr. They reached their destination after exactly 6 hours. Their mean speed was:

A, B & C are on a trip by a car. A drives during the first hour at an

1.	A, B & C are on a trip by a car. A drives during the first hour at an average speed of 50 km/hr. B drives during the next 2 hours at an average speed of 48 km/hr. C drives for the next 3 hours at an average speed of 52 km/hr. They reached their destination after exactly 6 hours. Their mean speed was:
A.	50 km/hr
B.	\(50\dfrac{1}{3}\) km/hr
C.	\(51\dfrac{1}{3}\) km/hr
D.	52 km/hr
Answer» C. \(51\dfrac{1}{3}\) km/hr

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