1.

The length of a wall is 9.0 m and its breadth is 4.2 m. A door is fitted in the wall.The length and breadth of the door are 2.5 m and 1m respectively. If the door is notrequired to be painted, find the cost of painting the wall at the rate of 12 per m2​

Answer»

ANSWER:

378.6 Rs.

Step-by-step EXPLANATION:

HEY there

The wall is in rectangular shape.

Formulae to find area of rectangle is L*b

i.e,

Multiply 9.0 and 4.2

U will get 37.8.-------------------------(1)

That means total are of wall is 37.8

Now you have to find area of the door

Formulae to find area of square is s²

i.e,

(2.5)²

U will get 6.25------------------------(2)

now to find area of wall excluding door

Subtract equation (1)&(2)

i.e,

37.8-6.25=31.55

31.55 is the area of wall to be painted

Now to find cost of painting wall

Multiply 31.55&12

U will get

378.6 Rs.

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