Introduction to statistics
A boy goes to a school from his home at a speed of km/hr and comes back at a speed of y km/hr, then the average speed is given by
Let the distance between the school and the home
be km. Then, total time taken in going to and coming from the
school is given by
Average speed H. M. of x and y
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Similar Questions
An automobile driver travels from a plain to a hill station 120 km away at an average speed of 30 km per hour. He then makes the return trip at an average speed of 25 km per hour. He covers another 120 km on the plain at an average speed of 50 km per hour. His average speed (in km/hr) over the entire distance of 360 km will be
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