Question

length and breadth and height of a room are 5 M 4 m and 3 M respectively find the cost of whitewashing the owner of the room and ceiling @ rupees 55 square metre

Answer 1

there you go your answer is 4070

Answer 2

Area of four walls = 2( Length + Breadth ) × hieght






Given,
Length = 5 m
Breadth = 4 m
Height = 3 m



Applying formula,

▶ Area of four walls = 2( 5 + 4 ) × 3 ( m × m )


▶ Area of four walls = 2( 9 ) × 3 m^2


▶ Area of four walls = 18 × 3 m^2


▶ Area of four walls = 54 m^2



And, Area of ceiling = length × breadth

▶Area of ceiling = 5 × 4 = 20 m²




So,
➡ Cost of white washing at ₹55 per square metre = ( Area of four walls + area of ceiling ) × 55



⏩ Cost of white washing = ( 20 + 54 m² ) × ₹ 55 / m²



⏩ Cost of white washing = 74 m² × ₹ 55 / m²


⏩ Cost of white washing = ₹ 4070
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