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Adam the Ant and Anna the Ant dared each other to grab a moving bicycle wheel.  Adam the Ant hung on for 20 seconds, in which time the wheel made 30 turns; then, he fell off.   Anna the Ant hung on 12 seconds longer than Adam the Ant.  How many times did she spin around on the bicycle wheel?

 Feb 7, 2019
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30 turns / 20 sec =  x turns / 12 sec        cross-multiply

 

12*30 =  20 * x

 

360 = 20 *x     divide both sides by 20

 

18 = x

 

So ....Anna spun 30 + 18 =   48 times

 

 

 

cool cool cool

 Feb 7, 2019

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