The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of $R s 7.50 p e r m^{2}$

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Solution

Area of walls $= 2 h (l + b)$

Area of ceiling $= l b$

Total Area $= 2 h (l + b) + l b$

$= 2 (3) (9) + 20 = 74 m^{2}$

Total cost = $7.50 \times 74 = 555$ Rs.

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The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs7.50perm2

Area of walls =2h(l+b)Area of ceiling =lbTotal Area =2h(l+b)+lb=2(3)(9)+20=74m2Total cost = 7.50×74=555 Rs.

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of $R s 7.50 p e r m^{2}$

Area of walls $= 2 h (l + b)$

Area of ceiling $= l b$

Total Area $= 2 h (l + b) + l b$

$= 2 (3) (9) + 20 = 74 m^{2}$

Total cost = $7.50 \times 74 = 555$ Rs.