One fast typist type some matter in 5hrs and another slow typist type the same matter in 6hrs. If both do combine in how much time they will take to finish.	Choose the correct choice from the following:
A) 2 hr 44 mins  B) 11 hr 40 mins  C) 2hr 14 mins  D) 3 hr 44 mins  E) 4 hr 44 mins
Fast's 1 hr work = 1/5   slow's 1 hr work = 1/6   1/5 + 1/6 = 11/30   they ll finish in 30/11hrs= 2 8/11 ==&gt; 2 hr 44 mins   2 hr 44 minsNSWER:2 hr 44 mins
<result>A</result>
One fast typist type some matter in 5hrs and another slow typist type the same matter in 6hrs. If both do combine in how much time they will take to finish.