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Question

The total amount of 49 is distributed among A, B, and C. A receives 5 more than B and B receives 4 more than C. What is the ratio of their shares ?

The correct answer is
21:16:12

Shares Ratio Calculation Method

Let the shares of A, B, and C be represented by $A$, $B$, and $C$ respectively.

We are given the following information:

  • The total amount is 49: $A + B + C = 49$.
  • A receives 5 more than B: $A = B + 5$.
  • B receives 4 more than C: $B = C + 4$.

Expressing Shares in Terms of One Variable

We can express the shares of A and B in terms of C:

  • Since $B = C + 4$.
  • Substitute this into the equation for A: $A = (C + 4) + 5 = C + 9$.

Now, all shares are defined relative to C.

Calculating Individual Shares

Substitute the expressions for A and B into the total amount equation:

$(C + 9) + (C + 4) + C = 49$

Combine the terms:

$3C + 13 = 49$

Solve for C:

$3C = 49 - 13$

$3C = 36$

$C = \frac{36}{3}$

$C = 12$

Now find B and A:

  • $B = C + 4 = 12 + 4 = 16$.
  • $A = B + 5 = 16 + 5 = 21$.

Determining the Ratio

The shares are $A=21$, $B=16$, and $C=12$.

The ratio of their shares $A:B:C$ is $21:16:12$.

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Important Questions from Simple Ratios

  1. The ratio of two numbers A and B is 5 : 8. If 5 is added to each of A and B, then the ratio of A and B becomes 2 : 3. The sum of A and B is:

  2. The ratio of two numbers A and B is 5: 8. If 5 is added to each of A and B, then the ratio becomes 2 : 3. The difference between A and B is:

  3. A sum of Rs. 6342 is divided amongst A, B, C and D in the ratio 3 : 4 : 8 : 6. What is the difference between the shares of B and D?

  4. The ratio of monthly incomes of A and B is 4 ∶ 5 and that of their monthly expenditures is 3 ∶ 8. If the income of A is equal to the expenditure of B, then what is the ratio of savings of A and B?

  5. The ratio of the monthly incomes of A and B is 11 : 13 and the ratio of their expenditures is 9 : 11. If both of them manage to save Rs. 4,000 per month, then find the difference in their incomes (in Rs.)

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