If 7 maids with 7 mops cleaned 7 floors in 7 hrs, how long would 3 maids take to clean 3 floors with 3 mops? (in hour)
A. 49/3
B. 3
C. 7
D. 7/3
Answer: Option C
Solution(By Examveda Team)
To clean 7 floors we need, 7 *7 = 49 maid-hoursTo clean 3 floors, they need, 3 *7 = 21 maid-hours
So, 21= 3 *X maid-hours
X = 7 hours.
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7 maid 7 mop clean 7 floor in 7 hours
Means 1 maid 1 mop clean 1 floor in 7 hours
3 maid 3 mops will clean 3 floor in 7 hours
Answer A 12 days
To clean 7 floors we need,
7 *7 = 49 maid-hours
To clean 3 floors, they need, 3 *7 = 21 maid-hours
So,
21= 3 *X maid-hours
X = 7 hours.