Question

Becca and Alice are training for a race. Becca runs 3 3/4 miles in 1/2 hour. Alice runs 5 1/4 miles in 3/4 hour. Who runs faster in miles per hour, and by how much?

Answer 1

We know, Speed = Distance / Time

Speed of Becca = 3 3/4 / 1/2
s = 15/4 / 1/2
s = 15/4 * 2
s = 15/2
s = 7.5 mph

Speed of Alice = 5 1/4 / 3/4
s = 21/4 / 3/4
s = 21/4 * 4/3
s = 7 mph

So, Becca runs faster by 0.5 mph

Hope this helps!