we need to find circumference of wheele
C=2pir
r=13
C=2pi13
C=26pi
aprox pi=3.14
C=81.64 in
15 miles in 1 hour
4 miles in x hour
15/1=4/x
times x both sides
15x=4
divide 15 both sides
x=0.26666666 hour
times 60 mins
x=16 minutes
how many inches is 4 miles
1miles=5280 feet
1foot=12 inches
5280 tiems 12=63360 inches
circumferenc times number of rotations=63360
81.64 times number=62260
divide both sids by 81.64
number of rotations=776.09...
round
776 rotations
16 minutes and 776 rotations