Riders of the scorpion must be at least

Question

48inches tall.Jim is 4 feet 2 inches tall. Kim is 3 inches shorter than jim. Give their heights in inches and tell who may ride.

Answer 1

there are 12 inches in a foot so convert feet to inches then add the remaining length in inches.
For example:
Bob is 3 feet 9 inches
3ft (12 in) = 36 inches 36 in + 9 in = 45 in
( 1 ft )

Answer 2

56