Question

1. a swimmer swims the length of a 50meter pool at an average speed of 3.2m/s. how long does this take?

50m%3.2m/s=2t

1. a student walks home in 0.25 hours after school. he lives 0.6km from the school. how fast was he walking?

Explanation:

Step1: Rearrange speed formula for time

$T = \frac{D}{S}$

Step2: Solve for swimmer's time

$T = \frac{50\ \text{m}}{3.2\ \text{m/s}} = 15.625\ \text{s}$

Step3: Use speed formula for walker

$S = \frac{D}{T}$

Step4: Calculate walker's speed

$S = \frac{0.6\ \text{km}}{0.25\ \text{h}} = 2.4\ \text{km/h}$

Answer:

1. 15.625 seconds
2. 2.4 km/h