Question

A hummingbird can travel up to 15 meters per second.What is the hummingbird's speed in miles per hour?1 mile ≈ 1609 meters Enter your answer, as a decimal to the nearest tenth, in the box. mph

Answer 1

SOLUTION

The speed of the hummingbird is giving as

$\text{ 15meter/seconds }$

Recall that

$1\text{mile}\approx1609\text{ meters }$

Hence

$\begin{gathered} 15\text{meters will be }\frac{15}{1609}miles\text{ } \\ \\ \end{gathered}$

Recall that

$3600\text{ seconds =1hour }$

Hence

the speed of the hummingbird in miles per hour will be

$\begin{gathered} \frac{15}{1609}\times\frac{3600}{1}=\frac{54000}{1609}=33.56\text{miles per hour } \\ \\ \end{gathered}$

Therefore the speed in miles per hour to the nearest tenth is 33.6mph