Correct Answer - Option 4 : 8 : 6 : 7
Given:
30% of water from bucket a is added to bucket b
Hence the water in the bucket b increases by 40%
Final ratio of water in the buckets a and c = 8 : 7
Formula Used:
If the volume of a quantity increase by x%,
New Quantity = [(100 + x)/100] × Initial Quantity
Calculation:
We are adding 30% of the quantity from the bucket a into bucket b and the quantity in bucket b increases by 40%,
⇒ [(30/100) × a] + b = [(100 + 40)/100] × b
⇒ 0.3a + b = 1.4 b
⇒ 0.3a = 0.4 b
Hence, a : b = 4 : 3
Now, a : b = 4 : 3 and a : c = 8 : 7
Also, to equate the two ratios, we can multiply the two parts of the ratio of a and b by 2 as:
a : b = (4 × 2) ∶ (3 × 2) = 8 ∶ 6
∴ a : b : c = 8 : 6 : 7