Question

2. A door of length 2 m and breadth 1m is fitted in a wall. The length of the wall is 4.5 m and the breadth is 3.6 m. Find the cost of white washing the wall, if the rate of white washing the wall is * 30 per m2. ​

Answer 1

Answer:

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Step-by-step explanation:

Length of the wall = 4.5 m

Breadth of the wall = 3.6 m

Area of the wall = Length × Breadth

= 4.5 m × 3.6 m

= 16.2 m2

Length of the door = 2 m

Breadth of the door = 1 m

So, area of the door = Length × Breadth

= 2 m × 1 m

= 2 m2

Area of the wall for whitewash = Area of the wall - Area of door

= 16.2 m2 - 2 m2

= 14.2 m2

The rate of whitewashing the wall = Rs. 20 per m2

The cost of whitewashing 14.2 m2 = 14.2 × Rs. 20 = Rs. 284