Question

a room is 14m long and 10m wide .it has two doors each measuring 2mby 1,5m and one window measuring 1.5m by 1.2.the cost of white washing it's four wall at rs 7.50 per m square is rs 990.find the height of the room.​

Answer 1

Answer:

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 = 132/48

h = 2.75 meter.

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