Which of these speed calculations is correct?
a. A car that travels 100 km in 2 hours has an average speed of 50 km/h.
b. A fish that swims 20 m in 5 seconds has an average speed of 5m/s.
c. A rocket that travels 100 km in 30 minutes has an average speed of 200 km/h.
d. A ball that rolls 2 m in 5 seconds has an average speed of 0.4 m/s.
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answer is option b
because fish swims 20m in 5s=20/5=4ms
but given 5ms
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