Chain Rule - Quantitative Aptitude (MCQ) questions for Q. 29732

Q.  20 girls can paint a house in 15 days. But the same house can be painted in just 10 days by 15 boys. If 10 boys and 10 girls are asked to work together, then in how many days will they complete the painting starting from scratch?
- Published on 03 May 17

a. 30 minutes
b. 45 minutes
c. 15 minutes
d. 10 days

ANSWER: 10 days
 
chain rule

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