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Bangladesh · Class 7 · Practice Sheet 31

Sheet code: BANGLADESH-G7-S31 · 20 questions

Name: ______________
Date: ______________
  1. 1.

    A rectangle is 31 cm long and 28 cm wide. Find its area.

    Formula:Area of a Rectangle
    A=l×wA = l \times w
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  2. 2.

    Find the perimeter of a rectangle measuring 17 m by 30 m.

    Formula:Perimeter of a Rectangle
    P=2(l+w)P = 2(l + w)
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  3. 3.

    A right-angled triangle has legs of 13 cm and 14 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
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  4. 4.

    One item costs ৳ 23.88. Find the total cost of 18 items.

    Formula:Total Cost
    total=price×quantity\text{total} = \text{price} \times \text{quantity}
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  5. 5.

    ৳ 1,500 is invested at 4% simple interest per year for 5 years. Find the interest earned.

    Formula:Simple Interest
    I=P×r×t100I = \dfrac{P \times r \times t}{100}
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  6. 6.

    A value changes from 55 to 102. Find the percentage change (to 2 d.p.).

    Formula:Percentage Change
    % change=new−oldold×100\%\,\text{change} = \dfrac{\text{new} - \text{old}}{\text{old}} \times 100
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  7. 7.

    Convert 7.63 kilometres into metres.

    Formula:Metric Length Conversion
    1 km=1000 m1\,\text{km} = 1000\,\text{m}
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  8. 8.

    A triangle has a base of 23 cm and a height of 17 cm. Find its area.

    Formula:Area of a Triangle
    A=12bhA = \tfrac{1}{2} b h
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  9. 9.

    Find the mean (average) of these numbers: 51, 63, 80, 62, 50.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  10. 10.

    A right-angled triangle has legs of 10 cm and 20 cm. Find the length of the hypotenuse.

    Formula:Pythagorean Theorem
    c=a2+b2c = \sqrt{a^2 + b^2}
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  11. 11.

    Find the mean (average) of these numbers: 41, 58, 70, 32, 96.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  12. 12.

    One item costs ৳ 15.53. Find the total cost of 15 items.

    Formula:Total Cost
    total=price×quantity\text{total} = \text{price} \times \text{quantity}
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  13. 13.

    Find the perimeter of a rectangle measuring 38 m by 26 m.

    Formula:Perimeter of a Rectangle
    P=2(l+w)P = 2(l + w)
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  14. 14.

    A train moves at 100 km/h for 1.9 hours. How far does it travel?

    Formula:Distance from Speed & Time
    d=v×td = v \times t
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  15. 15.

    A value changes from 50 to 22. Find the percentage change (to 2 d.p.).

    Formula:Percentage Change
    % change=new−oldold×100\%\,\text{change} = \dfrac{\text{new} - \text{old}}{\text{old}} \times 100
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  16. 16.

    What is 40% of 490?

    Formula:Percentage of a Quantity
    result=p100×N\text{result} = \dfrac{p}{100} \times N
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  17. 17.

    A circle has a radius of 17 cm. Find its area. (Use π ≈ 3.14159)

    Formula:Area of a Circle
    A=πr2A = \pi r^2
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  18. 18.

    A train moves at 49 km/h for 1.5 hours. How far does it travel?

    Formula:Distance from Speed & Time
    d=v×td = v \times t
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  19. 19.

    Find the mean (average) of these numbers: 72, 15, 60, 53, 29, 76.

    Formula:Arithmetic Mean
    xˉ=∑xn\bar{x} = \dfrac{\sum x}{n}
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  20. 20.

    A rectangle is 40 cm long and 15 cm wide. Find its area.

    Formula:Area of a Rectangle
    A=l×wA = l \times w
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