59 Views

Question : Ram can copy 60 pages in 15 hours. If Ram and Riya together can copy 180 pages in 30 hours, in how many hours can Riya copy 20 pages?

Option 1: 29 hours

Option 2: 12 hours

Option 3: 20 hours

Option 4: 10 hours


Team Careers360 24th Jan, 2024
Answer (1)
Team Careers360 25th Jan, 2024

Correct Answer: 10 hours


Solution : Given: Ram can copy 60 pages in 15 hours.
Total pages = Pages per hour × Time
Ram's rate is $\frac{60}{15} = 4$ pages per hour.
Together, Ram and Riya can copy 180 pages in 30 hours.
So, their combined rate (Ram + Riya) is $\frac{180}{30} = 6$ pages per hour.
Ram + Riya = 6 pages per hour
⇒ 4 + Riya = 6 pages per hour
⇒ Riya = 2 pages per hour
Let T be the time in hours for Riya.
So, 20 pages = 2 pages per hour × T
⇒ T $=\frac{20}{2}=10$ hours
Hence, the correct answer is 10 hours.

SSC CGL Complete Guide

Candidates can download this ebook to know all about SSC CGL.

Download EBook

Know More About

Related Questions

TOEFL ® Registrations 2024
Apply
Accepted by more than 11,000 universities in over 150 countries worldwide
Manipal Online M.Com Admissions
Apply
Apply for Online M.Com from Manipal University
View All Application Forms

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students
30,000+ Colleges
500+ Exams
1500+ E-books