Reeta can do a piece of work in 14 days and Geeta can do the same work in 21 days. How many days Reeta and Geeta take together to complete the same work?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 8.4.
Reeta can do a piece of work in 14 days and Geeta can do the same work in 21 days
L.C.M(14 and 21) = 42
The efficiency of Reeta = 42/14 = 3 units
The efficiency of Geeta = 42/21 = 2 units
Time taken by both = 42/5 = 8.4 days