Question
At a factory, Tim could assemble 7 toy helicopters in a day while Jenson could assemble 3 more toy helicopters than him in a day. If Jenson was absent for 5 days, how many days would he need to assemble 21 more toy helicopters than Tim?
3 m

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At a factory, Tim could assemble 7 toy helicopters in a day while Jenson could assemble 3 more toy helicopters than him in a day. If Jenson was absent for 5 days, how many days would he need to assemble 21 more toy helicopters than Tim?