A hall is 14 m long and 10 m wide. It has two
doors, each measuring 2.4 m by 1.8 m and one
window measuring 1.8 m by 1.5 m. The cost
of white washing its four walls at ₹ 7.50 per m*
₹990. Find the height of the room.
Answers
Explanation:
Cost of whitewashing for walls = 7.50 per meter²
Total cost of whitewashing = 990 rupees
Area on which whitewashing is done = 990 ÷ 7.5 = 132 meter²
Area of the 4 walls = 2(length × height) + 2(Width × height)
Let the height be 'h'
2(14h) + 2(10h) = 132
28h + 20h = 132
48h = 132
h = \frac{132}{48}
48
132
h = 2.75 meter
Height of the room is 2.75 meter
Height of the room is 2.75 meter.
Step-by-step explanation:
Cost of whitewashing for walls = 7.50 per meter²
Total cost of whitewashing = 990 rupees
Area on which whitewashing is done = 990 ÷ 7.5 = 132 meter²
Area of the 4 walls = 2(length × height) + 2(Width × height)
Let the height be 'h'
2(14h) + 2(10h) = 132
28h + 20h = 132
48h = 132
h = \frac{132}{48}
48
132
h = 2.75 meter
Height of the room is 2.75 meter.
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