Question
Atul walks 4 km at a speed of 2 km/h, runs 10 km at a
speed of 6 km/h and goes by bus for another 45 km. The speed of the bus is 30 km/h. Find the average speed of Atul.Solution
ATQ, Let the time of journey by walk, run and by bus be t1, t2, and t3 respectively, 
Total distance travelled by Atul = 4 + 10 + 45 = 59 km Total time taken by Atul = 2 + (5/3) + (3/2) = (31/6) By using the formula of Average speed, Average speed of Atul = 
Average speed of Atul =Â 11(13/31) km/h
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