Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 8 Answered

a computer typist types a page with 20 lines in 10 minutes but he leaves 8% margin on the left side of the page. now he has to type 23 pages with 49 lines on each page which he leaves 25% more margin than before. how much time is now required to type these 23 pages
Asked by ajayrath7 | 26 May, 2017, 07:19: PM
answered-by-expert Expert Answer
begin mathsize 14px style Assuming space every space line space has space 100 space characters space with space 8 percent sign space margin comma the space total space number space of space characters space written space in space one space line space is space 100 minus 8 space equals space 92. Time space taken space to space write space 20 space lines space is space 10 space mins. So comma space time space taken space to space write space 1 space line space with space 92 space characters space is space fraction numerator 10 over denominator 92 cross times 20 end fraction Now comma space when space the space margin space is space increased space by space 25 percent sign rightwards double arrow new space margin space is space 8 plus 0.25 cross times 8 equals 10 rightwards double arrow number space of space characters space per space line space now equals 90 Total space number space of space characters space to space be space written equals number space of space characters space per space line cross times number space of space lines space per space page cross times number space of space pages equals space 90 cross times 49 cross times 23 Total space time space required equals total space number space of space characters cross times time space required space to space type space one space character equals fraction numerator left parenthesis 90 cross times 49 cross times 23 right parenthesis cross times 10 over denominator 92 cross times 20 end fraction equals 551 space minutes space approximately equals space 9 space hours space left parenthesis approximately right parenthesis end style
Answered by Rebecca Fernandes | 24 Nov, 2017, 12:07: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 8 - Maths
Two cars start from the same point at speeds 60 km / h and 50km / h The slower car starts half an hour earlier. When will the other car catch up with the slower car?
Asked by mmanju10984 | 19 Jan, 2024, 06:29: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
by walking for 30 minutes in the morning a person cover to kilometre how much distance will he she cover in 20 minutes by walking at the same pace
Asked by sd9854849 | 07 Jan, 2024, 08:09: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
an elevator descent into a mind shaft at the rate of 6 m per minute if the Descent starts from 10 m above sea level how long will it take to reach 350 level ?
question image
Asked by mishramanisha242 | 20 May, 2022, 07:48: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
A man and boy can complete a work in 18 days . If a man works alone for last five days , he completes the work in 20 days .  How long will the boy take to complete the whole work alone
Asked by chehakkataria2006 | 02 Mar, 2020, 03:40: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
If 15 worker work 8-hour daily to make 100 cupboards in 12 days, so how many workers will take to make 150 cupboards in 18 days if they work 10 hours daily?
Asked by kaustubhkladda | 09 Feb, 2020, 12:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
A and B together can paint a room in 18days. They work together for8days and then B goes away.  A finishes the rest of work in 15days. How long would each take to finish the working separeately
Asked by acanilchauhan7 | 05 Nov, 2019, 11:50: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
75 KG of wheat is being consumed in 30 days by 24 person . How many person will consume in 5kg of wheat in one month and ten days ?
Asked by 365542180671386 | 16 Dec, 2018, 03:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
A can finish a job in 12 days while B can finish the same job in 15 days. How much time will they take, if both A and B work together?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
A cistern is filled by pipe in 12 hours and the full cistern can be leaked out by an exhaust pipe in 16 hours. If both the pipes are opened, in what time the cistern is full?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
Ram can do a job 15 days. His wife takes 20 days and his son finishes it in 25 days. How long will they take to complete the job if they all work together?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×