Deepak travels to Sohna 150 km away at an average speed of 55 km per hour and return at 45 km per hour. His average speed for the whole journey in km per hour is
Correct Answer: Description for Correct answer:
Average speed = \( \Large \frac{2xy}{x+y} km/hr \)
= \( \Large \left(\frac{2 \times 55 \times 45}{55 + 45}\right) km/hr \)
= \( \Large \left(\frac{4950}{100}\right) km/hr \)
= 49.5 km/hr
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