PSLE One copier took 70 minutes while another took 130 minutes to print the same number of leaflets. The faster copier printed 6 more leaflets per minute than the slower one.
- The slower copier completed the job at 2.21 p.m. At what time was the printing started?
- What was the total number of leaflets printed by the two copiers?
(a)
130 min before 2.21 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 70 min
= 70 x 6
= 420
Difference in the time needed to print the leaflets
= 130 - 70
= 60 min
Speed of the slower copier
= 420 ÷ 60
= 7
Number of leaflets printed by the slower copier
= 130 x 7
= 910
Both copiers printed the same number of leaflets.
Number of leaflets printed by the 2 copiers
= 2 x 910
= 1820
Answer(s): (a) 12.11 p.m.; (b) 1820