Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
249 views
in Commercial Mathematics by (28.9k points)
closed by
Aasheesh can paint his doll in 20 minutes and his sister Chinki can do so in 25 minutes. They paint the doll together for five minutes. At this juncture, they have a quarrel and Chinki withdraws from painting. In how many minutes will Aasheesh finish the painting of the remaining doll?

1 Answer

+1 vote
by (30.2k points)
selected by
 
Best answer

Given,

 Aasheesh can paint his doll in = 20 minutes

 Chinki can paint the same in = 25 minutes

 ∵ Aasheesh can paint in 1 minute \(=\frac{1}{20}\) part

Chinki can paint in 1 munute \(=\frac{1}{25}\) part

∵ They both can paint in 1 minute \(=\frac{1}{20}+\frac{1}{25}=\frac{5+4}{100}=\frac{9}{100}\) part

Work done by them in 5 minute \(={5}\times\frac{9}{100}=\frac{9}{100}\) part

Remaining work \(={1}-\frac{9}{20}=\frac{11}{20}\)part

So, Aasheesh can paint remaining doll in \(\frac{\frac{11}{20}}{\frac{1}{20}}\) = 11 minutes

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...