PSLE One copier took 80 minutes while another took 100 minutes to print the same number of leaflets. The faster copier printed 9 more leaflets per minute than the slower one.
- The slower copier completed the job at 1.51 p.m. At what time was the printing started?
- What was the total number of leaflets printed by the two copiers?
(a)
100 min before 1.51 p.m. = 12.11 p.m.
Time that the printing started for the slower copier = 12.11 p.m.
(b)
Extra leaflets that the faster copier printed in 80 min
= 80 x 9
= 720
Difference in the time needed to print the leaflets
= 100 - 80
= 20 min
Speed of the slower copier
= 720 ÷ 20
= 36
Number of leaflets printed by the slower copier
= 100 x 36
= 3600
Both copiers printed the same number of leaflets.
Number of leaflets printed by the 2 copiers
= 2 x 3600
= 7200
Answer(s): (a) 12.11 p.m.; (b) 7200