How many acres is Rick mowing?

Question

Rick cuts his grass with a riding mower with a 10 foot swath.  The mower goes seven miles per hour.  It takes Rick 2.5 hours to mow the lawn.  How many acres is Rick mowing?

Answer 1

d = r · t

d = 7(2.5)

d = 17.5 mi

d = 92400 ft

 

A = l · w

A = 92400(10)

A = 924000 ft² 

 

1 ft² = 2.29568 x 10^-5 acre

 

Can you multiply and answer?