UTpaper

Free mock tests & test series

Question 57Asked in DSSSB TGT Computer Science, 7 Feb 2024, Shift 2 (12:30 PM)

X and Y together can complete a work in 60 days. Y and Z together can complete the

X and Y together can complete a work in 60 days. Y and Z together can complete the same work in 90 days. If X, Y and Z all work together, then the same work gets completed in 45 days. How many days will X and Z together take to complete the same work?
  1. A120 days
  2. B90 days
  3. C60 days
  4. D150 days
Show answerHide answer

Correct answer: (C) 60 days

Explanation

X = (X+Y+Z) − (Y+Z) = 1/45 − 1/90 = 1/90; Z = 1/45 − 1/60 = 1/180. X + Z = 1/90 + 1/180 = 1/60, so 60 days.

From DSSSB TGT Computer Science PYQ, 7 Feb 2024, Shift 2 (12:30 PM)

This is question 57 of DSSSB TGT Computer Science PYQ, 7 Feb 2024, Shift 2 (12:30 PM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.