Question

A door of length 3 m and breadth 2 m is fitted in a wall. The length of the wall is 6.5 m and the breadth is 4 m. Find the cost of white washing the wall, if the rate of white washing the wall is ₹ 15 per m2. with method​

Answer 1

Answer:

Cost of white washing = 300 rupees

Step-by-step explanation:

Dimensions of door = 3 x 2 m

Dimensions of wall = 6.5 x 4 m

The area of remaining wall = 6.5(4) - 6

                                             = 20 $m^{2}$

Thus cost of whitewashing = 20 x 15

                                              = 300 rupees

Answer 2

Answer:

Step-1: Finding the area for calculating the cost

From the given values,

Area of the wall including the door =length×breadth

=4.5×3.6=16.2m

Area of the door =2×1=2m

Area of wall excluding door =16.2−2=14.2m

Step-2: Finding the cost of white washing

The rate of white washing 1m

of the wall is Rs.20

The rate of white washing 14.2m

of the wall is =20×14.2=Rs.284

Hence , the rate of white washing the wall excluding the door is Rs.284.

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