A car is moving on a straight road covers one third of the distance with a speed of 20 km/hr and the rest with a speed of 60 km/hr. The average of the car is ......
explain it guys.
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let total distance be d km
distance covers with speed 20kmph is d/3 and with 60kmph is 2/3d
average speed =total distance /total time
=. d /d/3÷20+2d/3÷60
d / d÷60+d/÷90
d/5d÷180=36 kmph
average speed is 36kmph
distance covers with speed 20kmph is d/3 and with 60kmph is 2/3d
average speed =total distance /total time
=. d /d/3÷20+2d/3÷60
d / d÷60+d/÷90
d/5d÷180=36 kmph
average speed is 36kmph
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