Solution:Let initially vessel have 81 liquid and xl of this liquid be replaced with water than quan-tity of water in new mixture= 3-3x/ 8 +8
Quantity of syrup in new mixture
= 5 - 5x/ 8
After replacement, the quantity of water and syrup same.
So, 3 - 3x/8 + y = 5 - 5x/
⇒ x = 815
So, the part of mixture replace
=8 /5 x 8 = 1/5 =