Find the area of four walls of a room having length, breadth and height as 8 m, 5 m and 3 m respectively. Find the cost of white washing the walls at the rate of Rs. 15/m² .
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Answer:
Step-by-step explanation:
Area of 4 walls of room = 2h(l+b)
= 2×3(8+5)
= 78 sq. m
Area of ceiling = l×b
= 8×5 = 40 sq. m
Area of whitewashing = 78+40=118sq.m
Cost of whitewashing = 15×118 = Rs. 1770
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area of four walls=2(l+b)h m²
=2(8+5)3 m²
=78m²
cost = rate x area
= 15 x 78
= 1170
=2(8+5)3 m²
=78m²
cost = rate x area
= 15 x 78
= 1170
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