from a rectangular solid of 42cm by 30cm by 20cm, a conical cavity of diameter 14cm and depth 24cm is drilled out. Find the surface area and volume of remaining solid and the weight of the material drilled out if it weighs 7gm per cm³
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Total surface area = TSA of cuboid + CSA of cone - base area of cone
Volume = Volume of cuboid - Volume of cone
Weight = Volume × 7
Volume = Volume of cuboid - Volume of cone
Weight = Volume × 7
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