Class 8 Maths – Chapter 11
Mensuration
STEP 6: Worksheet FULL Answers (Step-by-Step)
Q6. Find the area of a rectangle whose length is 12 cm and breadth is 8 cm.
Given:
Length = 12 cm, Breadth = 8 cm
Formula:
Area of rectangle = length × breadth
Solution:
= 12 × 8
= 96
Answer: Area = 96 cm²
Q7. Find the volume of a cuboid of dimensions 10 cm × 5 cm × 4 cm.
Given:
l = 10 cm, b = 5 cm, h = 4 cm
Formula:
Volume of cuboid = l × b × h
Solution:
= 10 × 5 × 4
= 200
Answer: Volume = 200 cm³
Q8. Find the curved surface area of a cylinder of radius 7 cm and height 14 cm.
Given:
Radius = 7 cm, Height = 14 cm
Formula:
CSA of cylinder = 2Ï€rh
Solution:
= 2 × (22/7) × 7 × 14
= 616
Answer: Curved Surface Area = 616 cm²
Q9. Find the total surface area of a cube of side 6 cm.
Given:
Side = 6 cm
Formula:
TSA of cube = 6a²
Solution:
= 6 × 6²
= 6 × 36
= 216
Answer: Total Surface Area = 216 cm²
Q10. Find the area of a circle of radius 14 cm.
Given:
Radius = 14 cm
Formula:
Area of circle = Ï€r²
Solution:
= (22/7) × 14 × 14
= 616
Answer: Area = 616 cm²
🎯 Exam Tip
Always write the formula clearly and mention units. This guarantees full marks in mensuration problems.
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