Class 9 Mathematics — Chapter 11: Surface Areas and Volumes
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 9 Mathematics, Chapter 11 (Surface Areas and Volumes). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Total surface area of a cuboid with length l, breadth b, height h is:
TSA of cuboid = 2(lb + bh + hl).
Find TSA of a cuboid with l=12cm, b=10cm, h=8cm.
TSA=2(12×10+10×8+8×12)=2(120+80+96)=2×296=592cm².
A copper sphere r=3cm is melted into a wire r=0.3cm. Find length of wire.
Volume sphere=(4/3)π×27=36π. Wire volume=π×0.09×l=36π→l=400cm. Wait: 0.3²=0.09. 0.09l=36→l=400. Answer 400cm.
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