Marco can finish a jigsaw puzzle in 3 hours. Working together with Cliff, it takes them 1 hour. How

Mathematics

1 answer:

vovikov84 [41]3 years ago

3 0

Macro can finish the puzzle in 3 hours. We can say that her speed for working is 1/3 or 1/3 puzzle per hour.

Now if they work together, this turns into 1 puzzle per hour.

That must mean that Cliff would be doing the other 2/3 of the puzzle while Macro does his 1/3 in that hour. If Cliff has a speed of doing them 2/3 per hour. Then it would take 1 and a half hour to finish 1 whole puzzle.

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