PSLEThere were a total of 144 tables and benches in a basketball court. There were 3 times as many benches as tables. After 13 benches and some tables were removed, there were 5 times as many benches as tables left. How many tables were removed from the basketball court?
|
Tables |
Benches |
Total |
Before |
1 u |
3 u |
144 |
Change |
- ? |
- 13 |
|
After |
1 p |
5 p |
|
Total number of tables and benches
= 3 u + 1 u
= 4 u
4 u = 144
1 u = 144 ÷ 4 = 36
Number of benches at first
= 3 u
= 3 x 36
= 108
Number of benches left
= 108 - 13
= 95
5 p = 95
1 p = 95 ÷ 5 = 19
Number of tables removed from the basketball court
= 36 - 19
= 17
Answer(s): 17