Cuboid, cube, right circular cylinder, cone, sphere — formulas and applications.
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Q1 · Surface Areas and Volumes (Class 9) · EASY
A cylindrical tank has a radius of 3.5 m and a height of 6 m. What is the total surface area of the tank? (Use π = 22/7)
Q2 · Surface Areas and Volumes (Class 9) · HARD
A solid sphere of radius 7 cm is melted and recast into smaller spheres each of radius 3.5 cm. How many smaller spheres can be formed?
Q3 · Surface Areas and Volumes (Class 9) · HARD
A hemisphere and a cone have equal bases and equal volumes. If the radius of their base is 7 cm, what is the height of the cone?