Choose the correct answer from the following.

Options

A. An area of one square centimeter is 10 times greater than one square meter.
B. 1 hour 18 min is equal to 3618 seconds
C. Sl unit of density is cubic metres.
D. Metre is the standard unit to measure length.

Explanation

To solve the question, we need to analyze each statement provided and determine which one is correct. Here’s a step-by-step breakdown:

### Step 1: Convert 1 hour and 18 minutes to seconds
1. **Convert hours to seconds**:
- 1 hour = 60 minutes
- 1 minute = 60 seconds
- Therefore, 1 hour = 60 minutes × 60 seconds/minute = 3600 seconds.

2. **Convert minutes to seconds**:
- 18 minutes = 18 × 60 seconds = 1080 seconds.

3. **Add both values together**:
- Total seconds = 3600 seconds (from 1 hour) + 1080 seconds (from 18 minutes) = 4680 seconds.

### Step 2: Analyze the options
1. **Option 1**: 1 hour, 18 minutes is equal to 3680 seconds.
- This is incorrect because we calculated it as 4680 seconds.

2. **Option 2**: SI unit of density is cubic meter.
- This is incorrect. The SI unit of density is kg/m³ (kilograms per cubic meter).

3. **Option 3**: Meter is the standard unit of measure length.
- This is correct. The meter is indeed the standard unit for measuring length in the SI system.

4. **Option 4**: Area of 1 square centimeter is 10 times greater than 1 square meter.
- This is incorrect. In fact, 1 square centimeter is much smaller than 1 square meter (1 m² = 10,000 cm²).

### Conclusion
The correct answer is **Option 3**: Meter is the standard unit of measure length.

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