RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 21. Mensuration-II (Volumes and Surface Areas of a Cuboid and a Cube)

Subject: Maths - Class 8th

Q. No. 12 of Exercise 21.3

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The perimeter of a floor of a room is 30 m and its height is 3 m. Find the area of four walls of the room.


Perimeter of floor = 30 m

Height of floor = 3 m




Area of four walls of room =

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