PSLE One copier took 50 minutes while another took 60 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 1.22 p.m. At what time was the printing started?
- What was the total number of leaflets printed by the two copiers?
(a)
60 min before 1.22 p.m. = 12.22 p.m.
Time that the printing started for the slower copier = 12.22 p.m.
(b)
Extra leaflets that the faster copier printed in 50 min
= 50 x 9
= 450
Difference in the time needed to print the leaflets
= 60 - 50
= 10 min
Speed of the slower copier
= 450 ÷ 10
= 45
Number of leaflets printed by the slower copier
= 60 x 45
= 2700
Both copiers printed the same number of leaflets.
Number of leaflets printed by the 2 copiers
= 2 x 2700
= 5400
Answer(s): (a) 12.22 p.m.; (b) 5400