PSLE One copier took 50 minutes while another took 100 minutes to print the same number of leaflets. The faster copier printed 4 more leaflets per minute than the slower one.
- The slower copier completed the job at 2.23 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 2.23 p.m. = 12.43 p.m.
Time that the printing started for the slower copier = 12.43 p.m.
(b)
Extra leaflets that the faster copier printed in 50 min
= 50 x 4
= 200
Difference in the time needed to print the leaflets
= 100 - 50
= 50 min
Speed of the slower copier
= 200 ÷ 50
= 4
Number of leaflets printed by the slower copier
= 100 x 4
= 400
Both copiers printed the same number of leaflets.
Number of leaflets printed by the 2 copiers
= 2 x 400
= 800
Answer(s): (a) 12.43 p.m.; (b) 800