Susan can type 12 pages in 6 minutes. Mary can type 6 pages in 12 minutes. Working together, how many pages can they type in 32 minutes?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 80.
Given:
Susan can type 12 pages in 6 minutes. Mary can type 6 pages in 12 minutes.
Concept used:
Work done = Efficiency × time
Calculations:
Efficiency of Susan = 2 pages/min
Efficiency of Mary = 0.5 pages/min
Required number of pages typed = (2 + 0.5) × 32
⇒ 2.5 × 32
⇒ 80