A trapezium based prism with two parallel sides 8 cm and 14 cm respect...
Volume of prism = (Base area) × height.
Base Area = Area of trapezium
= 1/2(8 + 14) × 8 = 88
∴ 1056 = 88 × height
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A trapezium based prism with two parallel sides 8 cm and 14 cm respect...
To find the height of the prism, we need to use the formula for the volume of a prism. The volume of a prism is given by the formula:
Volume = Base Area x Height
Given that the volume of the prism is 1056 and the base is a trapezium with parallel sides measuring 8 cm and 14 cm, we can find the height of the prism.
Let's solve it step by step:
1. Identify the given information:
- Parallel sides of the trapezium base: 8 cm and 14 cm
- Distance between the parallel sides: 8 cm
- Volume of the prism: 1056 cm³
2. Determine the base area of the prism:
The base area of a trapezium is given by the formula:
Base Area = (a + b) / 2 * h
where a and b are the lengths of the parallel sides and h is the height of the trapezium.
In this case, a = 8 cm, b = 14 cm, and h is the height of the trapezium. We need to find the height of the trapezium to calculate the base area.
3. Find the height of the trapezium:
To find the height of the trapezium, we can use the formula for the area of a trapezium:
Area = (a + b) / 2 * h
Rearrange the formula to solve for h:
h = 2 * Area / (a + b)
In this case, the area of the base is the same as the base area of the prism, so we can substitute the values:
h = 2 * Base Area / (a + b)
4. Substitute the given values and calculate the base area:
Base Area = (8 + 14) / 2 * h
Base Area = 22 / 2 * h
Base Area = 11 * h
5. Substitute the base area into the volume formula and solve for the height:
Volume = Base Area * Height
1056 = 11 * h * Height
1056 = 11h²
Divide both sides by 11:
96 = h²
Take the square root of both sides:
√96 = h
Simplify:
h ≈ 9.8 cm
Therefore, the height of the prism is approximately 9.8 cm.