A can type 10 pages in 5 minutes. B can type 5 pages in 10 minutes. Working together, how many pages can they type in 30 minutes?
- 15
- 25
- 65
- 75
Explanation
Efficiency of A = 10/5 =2
Efficiency of B = 5/10 = 0.5
No of page typed by A in 30 min
= 30 x 2 = 60
No of page typed B in 30 min
= 30 x 0.5 = 15
total page together is 60 + 15 = 75
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