Question

One litre of water is added to 5 litres of a 30% solution of alcohol in water. The strength of alcohol in
the new solution will be:
(a) 25%
(b) 18%
(c) 24%
(d) 20%​

Answer 1

Step-by-step explanation:

30× 5/100= 1.5 l

quantity of alcohol in 6 L = 1.5 L

now

1.5× 100/6= 25%

Answer 2

Answer:

25%

Step-by-step explanation:

Quantity of alcohol in 5 L of solution

= 30/100×5=3/2L

Quantity of alcohol in 6 L of solution = 3/2 L

Therefore, Strength of alcohol in new solution

(3/2/6×100)%=25%