Question

1. write each speed in metres per second.

a) the sailfish is the fastest swimmer, reaching a speed of up to 109 km/h.
b) a bald eagle can fly at a top speed of about 50 km/h.

Explanation:

Step1: Recall conversion factors

1 km = 1000 m and 1 h=3600 s. So, to convert km/h to m/s, we multiply by $\frac{1000}{3600}=\frac{5}{18}$.

Step2: Convert sail - fish speed

For the sail - fish with speed 109 km/h, the speed in m/s is $109\times\frac{5}{18}=\frac{545}{18}\approx30.28$ m/s.

Step3: Convert bald - eagle speed

For the bald - eagle with speed 50 km/h, the speed in m/s is $50\times\frac{5}{18}=\frac{250}{18}=\frac{125}{9}\approx13.89$ m/s.

Answer:

a) Approximately 30.28 m/s
b) Approximately 13.89 m/s