The average speed of bus for the first 150km is 50kmper hr the next 50 km is 25 kmper hr and the last 30km is 15kmper hr. Find the average speed of the bus for the entire journey
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50+25+15=90
90÷3=30
:30kmperhr is average speed of the bus...
90÷3=30
:30kmperhr is average speed of the bus...
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