X and Y can do a piece of work in 20 days and 12 days respectively .X started the work alone and then after 4 days Y joined him till the completion of the work . How long did the work last ?

A ) 15 days

B ) 20 days

C ) 10 days ✅

D ) 6 days

Related Questions
  1. رسالہ اسبابِ بغاوت ہند کس کی تحریر ہے ؟
  2. Which shortcut key is used to update selected fields ?
  3. How many members were there in Simon Commission?
  4. Fill in the blank with suitable word : Don't change ____ in midstream .
  5. Who is called Umar-e-Sani ?
Past Papers
PPSC 2025 Past Papers
PPSC Past Papers
NTS Past Papers
FPSC Past Papers
Lecture PPSC Past Papers
Punjab Police PPSC Past Papers
PMS Past Papers
IB Past Papers
Junior Clerk PPSC Past Papers
PPSC 2024 Past Papers
PPSC 2023 Past Papers
Pakistan Study Past Paper 2024
Geography Past Paper 2024
Ziladar Past Papers
Assistant Past Papers
OTS Past Papers
MCQs
Current Affairs MCQs
General Knowledge MCQs
English MCQs
Computer MCQs
Biology MCQs
Physics MCQs
Chemistry MCQs
Pak Study MCQs
Geography Topic Wise MCQ
Pakistan Study Topic Wise MCQ
General Knowledge Topic Wise MCQ
Everyday Science Topic Wise MCQ
Computer Science Topic Wise MCQ
English Topic Wise MCQ
Electrical Engineering MCQs
History of Pakistan MCQs
Sports MCQs
Economics MCQs
Abbreviation MCQs
World Record MCQs
Everyday Science MCQs
Urdu MCQs
Pedagogy MCQs
Educators
General Knowledge MCQs for Educators
Pakistan Affairs MCQs for Educators
Geography MCQs for Educators
Islamic Studies MCQs for Educators
Everyday Science MCQs for Educators
Computer MCQs for Educators
English MCQs for Educators
Current Affair MCQs for Educators
Mathematics MCQs for Educators
Urdu MCQs for Educators
Pedagogy MCQs for Educators
Head Teacher Preparation SED