PSLEThere were a total of 152 tables and benches in a hall. There were 3 times as many benches as tables. After 19 benches and some tables were removed, there were 5 times as many benches as tables left. How many tables were removed from the hall?
|
Tables |
Benches |
Total |
Before |
1 u |
3 u |
152 |
Change |
- ? |
- 19 |
|
After |
1 p |
5 p |
|
Total number of tables and benches
= 3 u + 1 u
= 4 u
4 u = 152
1 u = 152 ÷ 4 = 38
Number of benches at first
= 3 u
= 3 x 38
= 114
Number of benches left
= 114 - 19
= 95
5 p = 95
1 p = 95 ÷ 5 = 19
Number of tables removed from the hall
= 38 - 19
= 19
Answer(s): 19