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Standard XII

Physics

Finding Average Velocity

It is 260 km ...

Question

It is $260 km$ from Patna to Ranchi by air and $320 km$ by road. An airplane takes 30 minutes to go from Patna to Ranchi whereas a deluxe bus takes 8 hours. Find the average speed of the plane in $km/hr$ .

480

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520

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560

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600

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Solution

The correct option is B 520
$Average speed of plane = \frac{Distance}{Time}$
$= \frac{260 km}{0.5 h} = 520 km/h$

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It is 260 km from Patna to Ranchi by air and 320 km by road. An airplane takes 30 minutes to go from Patna to Ranchi whereas a deluxe bus takes 8 hours. Find the average speed of the plane in km/hr.

The correct option is B 520Average speed of plane =DistanceTime =260 km0.5 h=520 km/h

It is $260 km$ from Patna to Ranchi by air and $320 km$ by road. An airplane takes 30 minutes to go from Patna to Ranchi whereas a deluxe bus takes 8 hours. Find the average speed of the plane in $km/hr$ .

The correct option is B 520
$Average speed of plane = \frac{Distance}{Time}$
$= \frac{260 km}{0.5 h} = 520 km/h$