Explanation:

- Hridaya has a mix of Rs1, Rs2, Rs5, and Rs10 coins in her piggy bank.

- The ratio of the coins is 10:5:2:1.

- Total number of coins is 72.

To find out the number of each type of coin:

- Total ratio parts = 10 + 5 + 2 + 1 = 18

- Each part represents \(72/18 = 4\) coins.

Calculating each type:

- Rs1 coins = \(10 \times 4 = 40\)

- Rs2 coins = \(5 \times 4 = 20\)

- Rs5 coins = \(2 \times 4 = 8\)

- Rs10 coins = \(1 \times 4 = 4\)

Now calculating the total money:

- Total money = \(40 \times 1 + 20 \times 2 + 8 \times 5 + 4 \times 10\)

- = Rs40 + Rs40 + Rs40 + Rs40 = Rs160

Correct Answer: Option 3 - 160

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