a cyclist covers 7 1/2 km in 1/2an hour what is the average speed. answer in km per hour. metres pre minute and metres per second
Last edited by 2hot2domaths; Sep 9th 2008 at 05:01 AM. Reason: no units
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Originally Posted by 2hot2domaths a cyclist covers 7 1/2 km in 1/2> Mr F says: Without a unit of time for the 1/2 you're not going to get much help. what is the average speed. answer in km per hour. metres pre minute and metres per second Use speed = distance/time.
Originally Posted by 2hot2domaths a cyclist covers 7 1/2 km in 1/2an hour what is the average speed. answer in km per hour. metres pre minute and metres per second Note that 7 1/2 = 15/2. Speed = distance/time $\displaystyle = \frac{15/2}{1/2} = 15$ km/hr. 15 km/hr = 15000 m in 60 minutes = ...... m/min. 15 km/hr = 15000 m in 3600 seconds = ...... m/sec.
thnx but i still dont understand one bit howdu get that
Originally Posted by 2hot2domaths thnx but i still dont understand one bit howdu get that Which part don't you understand? 7 12/ km in 1/2 hour is equivalent to 15 km in 1 hour, that is, 15 km/hr.
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