A car travels from Bangalore to Mumbai and returns back to Bangalore again in 20 hrs. What is the average velocity and average speed of the car if the odometer reading of the car, when it started was 2200 km and when finished was 3800 km?

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A car driver travels from the plains to the hill station which are 200 km apart at an average speed of 40 km/hr. In the return trip he covers the same distance at an average speed of 20 km/hr. The average speed of the car over the entire distance of 400 km is

The correct option is A 26.67 km/hrVav=TotalDistanceTotaltimeT1=20040=5hrsT2=20020=10hrsVav=400T1+T2Vav=40015=26.67 Km/HrTherefore Answer is (B)

A car driver travels from the plains to the hill station which are $200$ km apart at an average speed of $40$ km/hr. In the return trip he covers the same distance at an average speed of $20$ km/hr. The average speed of the car over the entire distance of $400$ km is

The correct option is A $26.67$ km/hr
$V_{a v} = \frac{T o t a l D i s t a n c e}{T o t a l t i m e}$

$T_{1} = \frac{200}{40} = 5 h r s$

$T_{2} = \frac{200}{20} = 10 h r s$

$V_{a v} = \frac{400}{T_{1} + T_{2}}$

$V_{a v} = \frac{400}{15} = 26.67$ $K m / H r$

Therefore Answer is $(B)$