PSLEThere were a total of 102 tables and benches in a tuckshop. There were 2 times as many benches as tables. After 12 benches and some tables were removed, there were 4 times as many benches as tables left. How many tables were removed from the tuckshop?
|
Tables |
Benches |
Total |
Before |
1 u |
2 u |
102 |
Change |
- ? |
- 12 |
|
After |
1 p |
4 p |
|
Total number of tables and benches
= 2 u + 1 u
= 3 u
3 u = 102
1 u = 102 ÷ 3 = 34
Number of benches at first
= 2 u
= 2 x 34
= 68
Number of benches left
= 68 - 12
= 56
4 p = 56
1 p = 56 ÷ 4 = 14
Number of tables removed from the tuckshop
= 34 - 14
= 20
Answer(s): 20