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प्रश्न
It is 260 km from Patna to Ranchi by air and 320 km by road. An aeroplane takes 30 minutes to go from Patna to Ranchi whereas a delux bus takes 8 hours. Find the average speed of the plane.
टीपा लिहा
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उत्तर
Average speed of the plane, savg
\[= \left( \frac{\text{ Total distance travelled }}{\text{ Total time taken } } \right)\]
\[= \frac{260}{0 . 5} = 520 \text{ km }/h\]
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