✔ Correct Answer: D. More than 2 hr, but less than 4 hr

The correct answer to the question “A group of five clerks has been assigned to insert 24,000 letters into envelopes. The clerks perform this work at the following rates of speed: Clerk A, 1100 letters an hour; Clerk B, 1450 letters an hour; Clerk C, 1200 letters an hour; Clerk D, 1300 letters an hour; Clerk E, 1250 letters an hour. At the end of two hours of work, Clerk C and D are assigned to another task. From the time that Clerks C and D were taken off the assignment, the number of hours required for the remaining clerks to complete this assignment is?” is More than 2 hr, but less than 4 hr. This question belongs to Mathematics. Practice the related questions below to master this topic for your FPSC, PPSC and NTS tests.