PSLEThere were a total of 105 tables and benches in a tuckshop. There were 2 times as many benches as tables. After 15 benches and some tables were removed, there were 5 times as many benches as tables left. How many tables were removed from the tuckshop?
|
Tables |
Benches |
Total |
Before |
1 u |
2 u |
105 |
Change |
- ? |
- 15 |
|
After |
1 p |
5 p |
|
Total number of tables and benches
= 2 u + 1 u
= 3 u
3 u = 105
1 u = 105 ÷ 3 = 35
Number of benches at first
= 2 u
= 2 x 35
= 70
Number of benches left
= 70 - 15
= 55
5 p = 55
1 p = 55 ÷ 5 = 11
Number of tables removed from the tuckshop
= 35 - 11
= 24
Answer(s): 24