If cost of a candy is 50 paise and cost of an ice cream is Rs. 20, then the ratio of the cost of a candy to the cost of an ice-cream is______ .

Options

A. `40:1`
B. `1:40`
C. `1:20`
D. `1:15`

Answer

To find the ratio of the cost of a candy to the cost of an ice cream, we will follow these steps:

### Step 1: Identify the costs
- The cost of a candy is 50 paise.
- The cost of an ice cream is Rs. 20.

### Step 2: Convert the costs to the same unit
Since the cost of the candy is in paise and the cost of the ice cream is in rupees, we need to convert the cost of the ice cream into paise for easier comparison.
- 1 rupee = 100 paise
- Therefore, Rs. 20 = 20 × 100 paise = 2000 paise.

### Step 3: Write the ratio
Now that both costs are in paise, we can write the ratio of the cost of a candy to the cost of an ice cream.
- Ratio = Cost of candy : Cost of ice cream
- Ratio = 50 paise : 2000 paise

### Step 4: Simplify the ratio
To simplify the ratio, we can divide both terms by the cost of the candy (50 paise).
- Ratio = (50/50) : (2000/50)
- Ratio = 1 : 40

### Final Answer
The ratio of the cost of a candy to the cost of an ice cream is **1 : 40**.

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