1.

A room is 8 m long, 4 m broad and 3 m high. If all the walls are to be covered with paper 80 cm wide, then the length of the paper is –1). 100 m2). 80 m3). 120 m4). 90 m

Answer»

TOTAL surface area of the walls OFA room = 2 × ( LENGTH × height + breadth × height)

Given,a room is 8 m long, 4 m broad and 3 m high

⇒ Total surface area of the given room = 2 × (24 + 12) = 72 m2

Let the length of paper be ‘x’

Given, breadth of paper is 80 cm.

Area of paper = 0.8 × x sq. m.

∴ 0.8x = 72

⇒ x = 90m


Discussion

No Comment Found

Related InterviewSolutions