If 20 typists can type 46 letters in 20 minutes, then how many letters will 30 typists working at the same rate complete in 1 hour?
Options.
A) 63  B) 72  C) 144  D) 216  E) 207
20 typists can type 46 letters, so 30 typists can type = 46*30/20   46*30/20 letters can be typed in 20 mins. In 60 mins typist can type= 46*30*60/20*20= 207   207 is the answer
<result>E</result>
If 20 typists can type 46 letters in 20 minutes, then how many letters will 30 typists working at the same rate complete in 1 hour?