Question

An elephant can run 1/4 of a mile in 36 seconds. At this rate, which expression can be used to determine how fast an elephant runs in miles per hour?

Answer 1

Answer: 25 miles per hour

Step-by-step explanation: Since elephant run 1/4 miles in 36 sec

that means in 1 sec elephant runs 1/(4×36) miles

and 1 hour=60×60 sec

that means in 1 hour elephant runs (60×60)/(4×36) miles=25 miles

i.e. elephant runs 25 miles per hour

Answer 2

$\frac{0.25~mile}{36~s} \times \dfrac{60~s}{1~min} \times \dfrac{60~min}{1~hr} = 25 ~miles/hour$