Question

the lengtg breath and height of a room are 5m ,4m,3m respectively. find the cost of white washing the inner room and ceiling at the rate of rs 50per square metre

Answer 1

$\textbf{Solution:}$

Given:

• Length = 5m

• Breadth = 4m

• Height = 3m

➡ Area of Wall :

=> 2h (L+  b)

=> 2 × 3 ( 5 + 4 )

=> 6 × 9

=> 54 m^2

➡ Area of ceiling

=> l × b
=> 5 × 4
=> 20 m^2

➡ Total area = area of wall + area of ceiling.

=> ( 54 + 20 ) m^2

=> 74 m^2

➡ cost of white washing for 1 m^2 = Rs 50.

So, cost of white washing for 74 m^2

= Rs (50 × 74 )

= Rs 3700.

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$\textbf{Thank you!!}$