For a spherical ball bearing with radius 0.7 cm, the surface area formula 4πr² gives 4 × (22/7) × 0.7 × 0.7 = 6.16 cm². Class 9 Ganita Manjari Part 2 book Chapter 14 Question Answer Chapter 14 Math of Space ...
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For a spherical ball bearing with radius 0.7 cm, the surface area formula 4πr² gives 4 × (22/7) × 0.7 × 0.7 = 6.16 cm². Class 9 Ganita Manjari Part 2 book Chapter 14 Question Answer Chapter 14 Math of Space ...