A does a work in 10 days and b does the same work In 15 days In how many days they together will do the same work?
A does a work in 10 days and b does the same work In 15 days In how many days they together will do the same work?
A5 days
B6 days
C8 days
D10 days
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Corrct Answer: B [6 days]
Explanation:
\(\text{A's one day work =}\frac{1}{10}\)
\(\text{B's one day work = }\frac{1}{15}\)
\(\text{(A+B)'s one day's work }\)
\(=\frac{1}{10} + \frac{1}{15}\)
\(=\frac{3+2}{30}\)
\(=\frac{1}{6}\)
\(\therefore \text{A and B together work in 6 days. }\)
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