40 chocolate bars cost Rs 800. What will be the cost of 65 chocolate bars ? How many chocolate bars can we buy for Rs 1680 ?

Answer

To solve the problem step by step, we will break it down into two parts:

**Part 1: Finding the cost of 65 chocolate bars.**

1. **Find the cost of one chocolate bar.**
- We know that 40 chocolate bars cost Rs 800.
- To find the cost of one chocolate bar, we divide the total cost by the number of bars:
\[ \text{Cost of one chocolate} = \frac{800}{40} = 20 \text{ Rs} \]

2. **Calculate the cost of 65 chocolate bars.**
- Now that we know the cost of one chocolate bar is Rs 20, we can find the cost of 65 chocolate bars by multiplying the cost of one chocolate by 65:
\[ \text{Cost of 65 chocolates} = 20 \times 65 = 1300 \text{ Rs} \]

**Part 2: Finding how many chocolate bars can be bought for Rs 1680.**

3. **Find the number of chocolate bars that can be bought for Rs 1680.**
- We already know that the cost of one chocolate bar is Rs 20.
- To find out how many chocolate bars can be bought for Rs 1680, we divide the total amount of money by the cost of one chocolate:
\[ \text{Number of chocolates} = \frac{1680}{20} = 84 \]

**Final Answers:**
- The cost of 65 chocolate bars is Rs 1300.
- The number of chocolate bars that can be bought for Rs 1680 is 84.

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