1 Answers

Option 1 : 6 ∶ 4 ∶ 3

Short trick:

8 × 3 = 24

9 × 2 = 18

10 × 1.5 = 15

Ratio of time = 3 : 2 : 1.5 = 30 : 20 : 15 = 6 : 4 : 3

Detailed solution:

Let A, B and C invested the money for time t1, t2 and t3 respectively

Also, let profit of A, B and C be 24x, 18x and 15x, while Investment of A, B and C be 8y, 9y and 10y

Now,

⇒ Profit of A/Profit of B = (Investment of A × Time of investment of A)/(Investment of B × Time of investment of B)

⇒ 24x/18x = 8yt1/9yt2

⇒ t1/t2 = 3/2

Similarly,

⇒ Profit of B/Profit of C = (Investment of B × Time of investment of B)/(Investment of C × Time of investment of C)

⇒ 18x/15x = 9yt2/10yt3

⇒ t2/t3 = 2/1.5

Now, we have t1/t2 = 3/2 and t2/t3 = 2/1.5

⇒ t1 ∶ t2 ∶ t3 = 3 ∶ 2 ∶ 1.5 = 6 ∶ 4 ∶ 3
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