Question
A , B and C are on a trip by a car A drives during he 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 :
Answer: Option B
Was this answer helpful ?
Total distance travelled = ( 50 x 1 + 48 x 2 + 52 x 3 ) km = 302 km.
Total time taken = 6 hrs.
`:.` Mean speed = `(302/6)` km/hr = `50 1/3` km/hr.
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution