Question

A bus covers the first 128 km in 2 hours , next 240 km in 3 hours and the remaining 280 km in 4 hours.find the average speed of the bus.

Answer 1

Answer:

by finding the speed individually we have found that

64 ,80,70 are speeds respectively by the formula

speed is equals to distance upon time

so average speed is

64+80+70/3

214/3=71.33km/h ANSWER

HOPE IT WILL HELP YOU

Answer 2

Answer:

72

Step-by-step explanation:

average speed = total distance covered /total time taken

total distance = (128+240+280)=648km

tota time =2+3+4=9hr

total speed = 648/9 =72km/h

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