a car travels first half an hour with a speed of 10 metre per second in the next 40 minute with 20 metre per second calculate the (a) average velocity and(b) the total distance travelled by the car
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Suppose total distance is 2x km then
time taken in traveling the distance first x will be t
1
= 40x
and the time taken in traveling the distance second x will be t 2
= 60x
now the average velocity can be calculated as V=
total time
total distance = 40x + 60x2x = 40+60
2×40×60
=48Km/h
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