There are 2 groups of workers in a factory. There are 3 more workers in the first group than the second group. Each worker in the first group makes 5 toys in a minute but each worker in the second group makes only 4 toys in a minute. Both groups make a total of 12600 toys in 5 hours.
- How many workers are there in the first group?
- How many workers are there in the second group?
|
First group |
Second group |
Number |
1 u + 3 |
1 u |
Value |
5 |
4 |
Total value |
5 u + 15 |
4 u |
Number of workers in first group = 1 u + 3
Number of workers in second group = 1 u
Total number of toys made
= 5 u + 15 + 4 u
= 9 u + 15
1 h = 60 min
5 h = 5 x 60 = 300 min
Total number of toys made in 1 min
= 12600 ÷ 300
= 42
9 u + 15 = 42
9 u = 42 - 15
9 u = 27
1 u = 27 ÷ 9 = 3
Number of workers in the first group
= 1 u + 3
= 3 + 3
= 6
(b)
Number of workers in the second group
= 1 u
= 3
Answer(s): (a) 6; (b) 3