Some carpenters promised to do a job in 9 days but 5 of them were absent and remaining men did the job in 12 day. The original number of carpenters was ?
A. 24
B. 20
C. 16
D. 18
Answer: Option B
Solution(By Examveda Team)
Let there were N carpenters in the beginningAccording to the question,
$$\frac{{{{\text{N}}_{{\text{men}}}} \times {9_{{\text{days}}}}}}{{{{\text{1}}_{{\text{work}}}}}} = $$ $$\frac{{{{\left( {{\text{N}} - 5} \right)}_{{\text{men}}}} \times {{12}_{{\text{days}}}}}}{{{{\text{1}}_{{\text{work}}}}}}$$
$$\eqalign{ & {\text{3N}} = {\text{4N}} - 20 \cr & {\text{N}} = {\text{20 men}} \cr} $$
Related Questions on Time and Work
A. 18 days
B. 24 days
C. 30 days
D. 40 days
Join The Discussion