Question

1. the speed of a car traveling 200 meters in 10 seconds is equivalent to: *

a. 20 yards per second.
b. 2000 meters per second.
c. 72 kilometers per hour.
d. 115 miles per hour.

Explanation:

Step1: Calculate initial speed in m/s

Speed $v=\frac{d}{t}$, where $d = 200$ meters and $t = 10$ seconds. So $v=\frac{200}{10}=20$ m/s.

Step2: Convert m/s to km/h

We know that $1$ m/s=$3.6$ km/h. So $v = 20\times3.6=72$ km/h.

Step3: Analyze other options

1 yard $\approx0.9144$ meters. 20 yards per second is $20\times0.9144 = 18.288$ m/s $
eq20$ m/s. 2000 meters per second is much larger than 20 m/s. 1 mile $\approx1609.34$ meters. 115 miles per hour is $\frac{115\times1609.34}{3600}\approx51.4$ m/s $
eq20$ m/s.

Answer:

C. 72 kilometers per hour