and 4 m respectively. Find the length of the room.
18. A room is 8.5 m long, 6.5 m broad and 3.4 m high. It has two doors, each measuring 1.5 m
by 1 m, and two windows, each measuring 2 m by 1 m. Find the cost of painting its four
walls at Rs 4.60 per square metre.
The area of four walls of a room is 120 m2. If the length of the room is twice its breadth and
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Answer:
Find the area of the 4 walls including the doors:
Area of the 4 walls = 2(8.5 + 6.5) x 3.4
Area of the 4 walls = 102 m²
Find the area of the two doors:
1 door = 1.5 x 1
1 door = 1.5 m²
2 doors = 1.5 x 2
2 doors = 3 m²
Find the area of the two windows:
one window = 2 x 1
one window = 2 m²
two windows = 2 x 2
two windows = 4 m²
Find the area of the 4 walls without the doors:
Area = 102 - 3 - 4
Area = 95 m²
Find the cost:
1 m² = Rs 160
95 m² = 95 x 160
95 m² = Rs 15,200
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Answer:
18 .please refer to the above attachment for explanation .The answer will be Rs.15200.
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