PSLE One copier took 70 minutes while another took 100 minutes to print the same number of leaflets. The faster copier printed 3 more leaflets per minute than the slower one.
- The slower copier completed the job at 2.24 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 2.24 p.m. = 12.44 p.m.
Time that the printing started for the slower copier = 12.44 p.m.
(b)
Extra leaflets that the faster copier printed in 70 min
= 70 x 3
= 210
Difference in the time needed to print the leaflets
= 100 - 70
= 30 min
Speed of the slower copier
= 210 ÷ 30
= 7
Number of leaflets printed by the slower copier
= 100 x 7
= 700
Both copiers printed the same number of leaflets.
Number of leaflets printed by the 2 copiers
= 2 x 700
= 1400
Answer(s): (a) 12.44 p.m.; (b) 1400