Goutham drives his car to a place 450 km away at an average speed of 60 km/hr and returns at 45 km/hr. What is his average speed for the whole journey?

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55.2

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50.5

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51.4

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Solution

The correct option is E
51.4

Avg. speed = $\frac{2 \times 60 \times 45}{60 + 45} = 51.4$

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Goutham drives his car to a place 450 km away at an average speed of 60 km/hr and returns at 45 km/hr. What is his average speed for the whole journey?

The correct option is E 51.4 Avg. speed =2×60×4560+45=51.4

The correct option is E
51.4

Avg. speed = $\frac{2 \times 60 \times 45}{60 + 45} = 51.4$