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1 vote
Express each of the following in km/hour.

(a) 8.4km/min
(b) 315m/second
(c) 242m/min
(d) 125cm/s

1 Answer

4 votes

a) We convert per minute to per hour so we multiply it by 60 to get:

=> 504km/h

b) We convert per second to per hour so we multiply it by 3600 to get:

=> 1134000m/h

=> We then convert meters into km to get:

=> 1134km/h

c) We convert per minute to per hour so we multiply it by 60 to get:

=> 14520m/h

=> Now we convert meters into km once again so we get:

=> 14.52km/h

d) We convert per second to per hour so we multiply it by 3600 to get:

=> 450000cm/h

=> We now convert cm into km which means we divide it by 100,000

=> 4.5km/h

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