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1. Susan can type 10 pages in 5 minutes. Mary can type 5 pages in 10 minutes. Working together , how many pages can they type in 30 minutes ?
- A. 15
- B. 15
- C. 15
- D. 15
Answer: Option D
Explanation:
Susan 5 minutes 10 pages
Susan 30 minutes (10×30)/5 = 60 pages
Mary 10 minutes 5 pages
Mary 30 minutes (5×30)/10 = 15 pages
60 + 15 = 75 pages
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