Home › Capgemini Hiring › Quantitative Aptitude › Time and Work › Panu, Jiban and Jalil complete a task alone in 3…
Panu, Jiban and Jalil complete a task alone in 30, 20 and 60 days respectively. Jiban works daily and Panu and Jalil help on every third day. How many days to finish?
A13
B12
C15
D14
Answer & Solution
Correct answer: C. 15
1. Daily rates: Jiban 1/20, Panu 1/30, Jalil 1/60.
2. Day 1 and Day 2 Jiban alone: 1/20 each. Day 3 all three: 1/20 + 1/30 + 1/60 = 6/60 = 1/10.
3. One 3-day cycle = 1/20 + 1/20 + 1/10 = 1/5. Five cycles = 5 x 1/5 = 1 (whole task), so 5 x 3 = 15 days.
_Source: RRB Group D CEN-02/2018 PYQ, Q.32._
Related questions
Those two workers, at that combined rate, finish the whole job in:A worker finishing in 5 hours and another in 20 hours together do what share of the job eaConverting two fifths of an hour into minutes gives:In work problems, the parts of the job done by each worker in one hour add up to:Flying into that same 30 mph wind, the same plane's ground speed would be:A plane's ground speed with a tailwind of 30 mph, if the plane itself flies at 150 mph, isOn that drive, Tony's interstate speed was:Tony drives 4 hours in all, 208 miles on the interstate and 40 on country roads, going 15