Question

If Machine A makes a yo-yo every five minutes and Machine B takes ten minutes to make a yo-yo, how many hours would it take them working together to make 20yo−yos?

Answer 1

1 hour 10 mins

Explanation:

3 every 10 mins

20/3 = 6 r 2

(6 2/3) x 10

Answer 2

Answer: that will be basically 1 hour and 10 mins

Explanation:

Machine A provide 1 yo-yo for 5mins, there for in 10mins. Of machine A = 2 yo-yo

While machine B provides 1 yo-yo in 10mins.

Which gives us total of

3 every 10 mins

Therefore,

20/3 = 6 remainder 2

Which finally gives us

(6 2/3) x 10