Question

A man can type 20 lines in 10 minutes but he leaves 8% margin in each line. In how much time he will type 23 pages with 40 lines on each page leaving 25% more margin than before

Answer 1

a man can type 20 in 10 min
so,a .................... 1 ......20/10=2 min
for one line margin=8%
so,8%of2
8/100*2
0.16
he types 23*40 lines
.....,,......,,..920....,,.......
margins= 0.16+25% per lines
= 0.41 ..,....,.......
now, when margins is 0.16 min then he take 2 min for per page
,.......,,,...............................,.,........,.1 ...,................................2/0.16 min...........,,.
when.,..........................................0.41 min.......,..,.....2/0.16*0.41=5.125 min.
so, time = 5.125 *920
= 4715 min (ans) or 78.58 hours (and)

Answer 2

Step-by-step explanation:

450 is the right answer see my solution and like it