PSLEThere were a total of 192 tables and benches in a canteen. There were 3 times as many benches as tables. After 16 benches and some tables were removed, there were 4 times as many benches as tables left. How many tables were removed from the canteen?
|
Tables |
Benches |
Total |
Before |
1 u |
3 u |
192 |
Change |
- ? |
- 16 |
|
After |
1 p |
4 p |
|
Total number of tables and benches
= 3 u + 1 u
= 4 u
4 u = 192
1 u = 192 ÷ 4 = 48
Number of benches at first
= 3 u
= 3 x 48
= 144
Number of benches left
= 144 - 16
= 128
4 p = 128
1 p = 128 ÷ 4 = 32
Number of tables removed from the canteen
= 48 - 32
= 16
Answer(s): 16