Question

Charlie runs at a speed of 3 yards per second. About how many miles per hour does Charlie run?

Answer 1

(1 hour) x (60 min/hr) x (60 sec/min) = 3,600 seconds

(3 yards/sec) x (3,600 sec/hour)  x (1 mile / 1,760 yards)  =

           ( 3 x 3,600 / 1,760 )  mile/hour  =  6.14 miles/hour (rounded)