a square wall of length 7m is to be painted find cost of painting at the rate of 80per m^3​

2 thoughts on “a square wall of length 7m is to be painted find cost of painting at the rate of 80per m^3​”

1. [tex]\bigstar{\sf{\huge{\underline{\red{Given\: :-}}}}}[/tex]

   Length = 7m

   Rate of painting = 80/m²

   [tex]\bigstar{\sf{\huge{\underline{\red{Concept\: :-}}}}}[/tex]

   Portion of the wall to be painted = it’s area.

   => area of a square of 7m = portion of the wall required to paint

   [tex]\bigstar{\sf{\huge{\underline{\red{Solution\: :-}}}}}[/tex]

   Area of a square = side²

   => Area of a square of 7m = (7m)²

   = 49m²

   Now,

   Cost of 1 m² of painting = 80

   => cost of 49m² of painting = 80 × 49

   = 3920

   [tex]{\sf{\huge{\fbox{\blue{Cost\: =\: 3920}}}}}[/tex]

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2. Answer:

   ₹ 3920

   Step-by-step explanation:

   Given :-

   Length of the square wall (a) = 7 m.

   Find :-

   Cost of painting at the rate of ₹ 80 per m².

   Now,

   Area of a square = a²

   = (7)²

   = 49 m²

   Cost for 1 m² = ₹ 80

   Cost for 49 m² = 80 × 49

   = 3920

   Therefore, the cost for painting the wall of length 7 m is ₹ 3920.

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