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Mary can paint 30 pots in 5 hours, and Pia could finish painting the 30 pots in 6 hours. How long would it take both of them to finish the job together?.

Sagot :

Zjuidn

Mary can paint 30 pots in 5 hours. Assuming that she works at a constant rate, she can paint 6 pots per hour.

Pia can paint 30 pots in 6 hours. That means she can paint 5 pots per hour.

If they work together they can paint 6 + 5 = 11 pots per hour. So they can finish painting 30 pots in 30/11 hours.