Question

Convert 88 feet per second into kilometers per hour.

Answer 1

One convenient conversion factor is 1 m = 39.37 in

1 m = 39.37 in / 12 in / ft = 3.281 ft

88 (ft / sec) / 3.281 m / ft = 26.82 m / sec

26.82 m/sec * 3600 sec / hr = 96560 m / hr

96560 (m / hr) / 1000 (m / km) = 96.56 km / hr the desired result

Note 88 ft / sec = 60 mi / hr

96.56 / 60 = 1.609 km / mi agreeing with the accepted value