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A car passes Dhaka at 9:55 am and Gazipur at 10:15 am. Gazipur is 30 miles from Dhaka. What is the average speed of the car in miles per hour?

A car passes Dhaka at 9:55 am and Gazipur at 10:15 am. Gazipur is 30 miles from Dhaka. What is the average speed of the car in miles per hour? Correct Answer 90

Time spent = 9:55am to 10:15am = 20 minutes = 1/3 hours. Average speed = 30 / (1/3) =  90 miles per hour

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