Four friends compared there bike riding times. Jess rode 4.25 km in 20 min. Corey rode 3.75 km in 18 min. Mia rode 3.5 km in 17 min. Zoey rode 3.6 km in 16 min.

Who rode at the greatest rate of speed?

A.

Jess

B.

Corey

C.

Mia

D.

Zoey

Jess rode 4.25 km in 20 min.

Speed = 4.25: 20 = 0.212 km/min

Corey rode 3.75 km in 18 min.

S = 3.75 : 18 = 0.208

Mia rode 3.5 km in 17 min.

S = 3.5 : 17 = 0.205

Zoey rode 3.6 km in 16 min.

S = 3.6 : 16 = 0.225

The greatest rate of speed : ZOE with 0.225 km/min