Basic Mensuration - Area & Perimeter

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Q1. A rectangle has a length of 8 cm and a width of 3 cm. What is its area?

Solution:

Area = length × width = 8 cm × 3 cm = 24 cm².

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Q2. What is 20 divided by 5?

Solution:

20 ÷ 5 = 4.

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Q3. What is 3 times 7?

Solution:

3 × 7 = 21.

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Q4. A rectangle has an area of 24 cm² and a width of 4 cm. What is its length?

Solution:

Area = length × width, so length = Area ÷ width = 24 cm² ÷ 4 cm = 6 cm.

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Q5. A garden is 10 meters long and 6 meters wide. What is the area of the garden?

Solution:

Area = length × width = 10 m × 6 m = 60 m².

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Q6. If a square has a side length of 4 cm, what is its perimeter?

Solution:

Perimeter = 4 × side = 4 × 4 cm = 16 cm.

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Q7. What is 15 minus 9?

Solution:

15 - 9 = 6.

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Q8. What is 20 - 7?

Solution:

20 - 7 = 13.

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Q9. What is the perimeter of a rectangle with a length of 7 cm and a width of 2 cm?

Solution:

Perimeter = 2 × (length + width) = 2 × (7 cm + 2 cm) = 18 cm.

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Q10. A rectangle has an area of 30 cm² and a width of 5 cm. What is its length?

Solution:

Area = length × width, so length = Area ÷ width = 30 cm² ÷ 5 cm = 6 cm.