an indy race car can travel 111 m/s. what is the speed of the car in miles per hour?

1609.34 meter = 1 miles

therefore 1 meter = 1/1609.34 miles

or, 111 meter = 1/1609.34 x 111 =0.069 miles

3600 sec = 1 hour

1 second = 1/3600 hrs

111 m/sec = 0.069 /(1/3600) = 3600 x 0.069 = 248.3 miles/hr

Please ask if you have any doubt ......

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