Which of the following is not correct?

Options

A. Area of a square of side
10 cm =

Area of a rectangle of length 10 cm and
breadth 0.1m
B. 1 m 5 cm = 1.05 m
C. 40 is same as 0.4
D. `Rs(3)/(4) =Rs.75`

Answer

To determine which of the following statements is not correct, we will analyze each option step by step.

### Step 1: Analyze the First Option
**Statement:** Area of a square of side 10 cm is equal to the area of a rectangle of length 10 cm and breadth 0.1 m.

- **Area of the Square:**
- Formula: Area = Side × Side
- Calculation: Area = 10 cm × 10 cm = 100 cm²

- **Area of the Rectangle:**
- Formula: Area = Length × Breadth
- Length = 10 cm
- Breadth = 0.1 m = 0.1 × 100 cm = 10 cm (since 1 m = 100 cm)
- Calculation: Area = 10 cm × 10 cm = 100 cm²

**Conclusion for Option 1:** Both areas are equal (100 cm²), so this statement is correct.

### Step 2: Analyze the Second Option
**Statement:** 1 m 5 cm is equal to 1.05 m.

- **Conversion of 1 m 5 cm to cm:**
- 1 m = 100 cm
- Therefore, 1 m 5 cm = 100 cm + 5 cm = 105 cm

- **Conversion of 1.05 m to cm:**
- 1.05 m = 1.05 × 100 cm = 105 cm

**Conclusion for Option 2:** Both values are equal (105 cm), so this statement is correct.

### Step 3: Analyze the Third Option
**Statement:** 40 paise is the same as 0.4 rupees.

- **Conversion of 40 paise to rupees:**
- 1 rupee = 100 paise
- Therefore, 40 paise = 40/100 rupees = 0.4 rupees

**Conclusion for Option 3:** This statement is correct.

### Step 4: Analyze the Fourth Option
**Statement:** 3/4 rupees equals 75 rupees.

- **Conversion of 3/4 rupees to decimal:**
- 3/4 = 0.75 rupees

**Comparison:**
- 0.75 rupees is not equal to 75 rupees.

**Conclusion for Option 4:** This statement is incorrect.

### Final Answer
The statement that is not correct is **Option 4: 3/4 rupees equals 75 rupees.**

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