PSLE One copier took 90 minutes while another took 110 minutes to print the same number of leaflets. The faster copier printed 8 more leaflets per minute than the slower one.
- The slower copier completed the job at 2.15 p.m. At what time was the printing started?
- What was the total number of leaflets printed by the two copiers?
(a)
110 min before 2.15 p.m. = 12.25 p.m.
Time that the printing started for the slower copier = 12.25 p.m.
(b)
Extra leaflets that the faster copier printed in 90 min
= 90 x 8
= 720
Difference in the time needed to print the leaflets
= 110 - 90
= 20 min
Speed of the slower copier
= 720 ÷ 20
= 36
Number of leaflets printed by the slower copier
= 110 x 36
= 3960
Both copiers printed the same number of leaflets.
Number of leaflets printed by the 2 copiers
= 2 x 3960
= 7920
Answer(s): (a) 12.25 p.m.; (b) 7920