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?
Choose the correct choice from the following:
A) 15
B) 20
C) 25
D) 65
E) 75
susan can type 2 pages in 1 min   mary can type 0.5pages in 1 min   so, both of them work together they type 2.5 pages in 1 min   so,in 30 min they type (30*2.5)= 
<gadget id="calculator">(30*2.5)</gadget>
<output>75</output>
75 pages   ANSW75R:75
<result>E</result>
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?