Volume refers to the amount of space that a three-dimensional object takes up. It is measured in cubic units such as cubic meters (m³) or cubic centimeters (cm³). To find the volume of a solid object, you need to multiply the object's length, width, and height.
For example, if you have a rectangular prism with a length of 5 cm, a width of 3 cm, and a height of 2 cm, you can find its volume by multiplying those three measurements:
Volume = Length x Width x Height = 5 cm x 3 cm x 2 cm = 30 cm³
Total surface area, on the other hand, refers to the total area of all the surfaces of a three-dimensional object. It is measured in square units such as square meters (m²) or square centimeters (cm²). To find the total surface area of a solid object, you need to calculate the area of each face and then add up those areas.
For example, if you have a cube with each side measuring 4 cm, you can find its total surface area by using the formula:
Total Surface Area = 6 x (side length)²
So for this cube, the total surface area would be:
Total Surface Area = 6 x (4 cm)² = 96 cm²
I hope this helps! Let me know if you have any further questions.
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write 10 mcqs on area and perimeter for 8th class
Sure! Here are 10 multiple choice questions on area and perimeter for 8th class:
What is the formula for the perimeter of a rectangle?
A) P = l + w
B) P = 2l + w
C) P = 2l + 2w
D) P = l x w
Answer: C
What is the formula for the area of a triangle?
A) A = l x w
B) A = bh
C) A = s²
D) A = πr²
Answer: B
What is the formula for the perimeter of a circle?
A) P = 2πr
B) P = πr²
C) P = πd
D) P = 4r
Answer: A
What is the formula for the area of a parallelogram?
A) A = l x w
B) A = bh
C) A = s²
D) A = πr²
Answer: B
What is the formula for the perimeter of a square?
A) P = l + w
B) P = 2l + w
C) P = 2l + 2w
D) P = 4s
Answer: D
What is the formula for the area of a circle?
A) A = 2πr
B) A = πr²
C) A = πd
D) A = 4r²
Answer: B
What is the formula for the perimeter of a regular hexagon?
A) P = 6s
B) P = 2πr
C) P = 4s
D) P = 3s
Answer: A
What is the formula for the area of a trapezoid?
A) A = l x w
B) A = bh
C) A = s²
D) A = (b1 + b2)h/2
Answer: D
What is the formula for the perimeter of a triangle?
A) P = l + w
B) P = 2l + w
C) P = 2l + 2w
D) P = a + b + c
Answer: D
What is the formula for the area of a rectangle?
A) A = l x w
B) A = bh
C) A = s²
D) A = πr²
Answer: A
