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Quantitative Aptitude

Inversely Proportional

An odometer r...

Question

An odometer read $2510 k m$ when Prateek started his car journey from his house to his office. After he reached there in two hours, it was showing $2750 k m$ . Find the average speed of his car.

60 k m / h

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120 k m / h

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180 k m / h

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240 k m / h

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Solution

The correct option is B $120 k m / h$
Initially odometer read 2510 km which meant that before starting the car journey, the car had travelled a total distance of 2510 km.

Now as he ended his journey from his home to his office, he covered a distance
= (2750 - 2510) km = 240 km

Time taken = 2 hours
We know, average speed =Total distance covered/Total time taken = 240/2 = 120 km/h

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An odometer read 2510 km when Prateek started his car journey from his house to his office. After he reached there in two hours, it was showing 2750 km. Find the average speed of his car.

An odometer read $2510 k m$ when Prateek started his car journey from his house to his office. After he reached there in two hours, it was showing $2750 k m$ . Find the average speed of his car.