If 30% of A = 0.25 of B = 1/5 of C, then find A: B: C. Option 1: 16:24:30 Option 2: 10:12:15 Option 3: 15:12:10 Option 4: 2:4:6

Answer: 10:12:15. Solution: Let 0.30A = 0.25B = 0.20C = k. Then A = k/0.3, B = k/0.25, C = k/0.2. So A:B:C = 1/0.3:1/0.25:1/0.2 = 10/3:4:5 = 10:12:15.

Arithmetic

Ratio, Proportion & Variation

Easy

If 30% of A = 0.25 of B = $\frac{1}{5}$ of C, then find A: B: C.

16:24:30

10:12:15

15:12:10

2:4:6

✅ Correct Option: 2

Let $0.30A = 0.25B = 0.20C = k$ .

Then $A = \frac{k}{0.3}$ , $B = \frac{k}{0.25}$ , $C = \frac{k}{0.2}$ .

So $A:B:C = \frac{1}{0.3}:\frac{1}{0.25}:\frac{1}{0.2} = \frac{10}{3}:4:5 = 10:12:15$ .

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If 30% of A = 0.25 of B = $\frac{1}{5}$ of C, then find A: B: C.