The ratio of the height of a room to its semi-perimeter is 2:5. It costs Rs. 260 to paper the walls of the room with paper 50 cm wide at Rs. 2 per m allowing an area of 15 sq. m for doors and windows. The height of the room is |
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(a) |
2.6 m |
(b) |
3.9 m |
(c) |
4 m |
(d) |
4.2 m |

The ratio of the height of a room to its semi-perimeter is 2:5. It costs Rs. 260 to paper the walls of the room with paper 50 cm wide at Rs. 2 per m allowing an area of 15 sq. m for doors and windows. The height of the room is |
|||||||

(a) |
2.6 m |
(b) |
3.9 m |
(c) |
4 m |
(d) |
4.2 m |

1 Answer

127 votes

Let and

Length of the paper = m.

Area of the paper =

Total area of 4 walls =

Height of the room = 4 m.

127 votes

127