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A boy must take a red tablet every 20 minutes and a blue tablet every35 minutes. If he takes both tablets at 12pm, what time will he next take both tablets together?

 Sep 18, 2020
 #1
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red    20    40   60  80  100  120   140   160  min

blue  35               70          105      140           min

 

140 min is  2 hr 20 min   

Assuming 12 pm is noon,  tablets will be taken together at  2:20 PM     or    14:20

 Sep 18, 2020

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