One fast typist type some matter in 2hrs and another slow typist type the same matter in 3hrs. If both do combine in how much time they will take to finish.
Pick.
A) 10
B) 11
C) 12
D) 13
E) 14
Fast's 1 hr work = 1/2   slow's 1 hr work = 1/3   1/2 + 1/3 = 5/6   they ll finish in 6/5hrs= 1 1/5 ==&gt; 1 hr 12 mins   ANSWER:12
<result>C</result>
One fast typist type some matter in 2hrs and another slow typist type the same matter in 3hrs. If both do combine in how much time they will take to finish.