It takes Sally 4 hours to deliver newspapers. If Kathy works alone, it takes her 6 hours. How long would it take them working to
gether to deliver all of the newspapers?
1 answer:
<span>Sally's rate is 1/4 job per hour.
Kathy's rate is 1/6 job per hour.
Can you solve the rest? Scroll down if you can't!
1/4 + 1/6
= 3/12 + 2/12
= 5/12
5/12 x 6 = 30/60.
Answer: It will take them half an hour combined. </span>
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