Question

A door of length 2m and breadth 1m is fitted in a wall. The length of the wall is 4.5m and the breadth is 3.6m. Find the cost of white washing the wall, if the rate of white washing the wall is Rs. 20 per square meter.​

Answer 1

Answer: Rs.284

Step-by-step explanation:Cost= Rate × [ (area of whole wall) - (area of door)]

= Rs. 20/$m^{2}$ × [( 4.5m × 3.6m) - (2m × 1m)]

= Rs. 20/$m^{2}$ × [( 16.2$m^{2}$) - (2$m^{2}$)]

= Rs. 20/$m^{2}$ ×14.2$m^{2}$

= Rs. 20 × 14.2

= Rs. 284

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Answer 2

QUESTION:⤵️

A door of length 2m and breadth 1m is fitted in a wall. The length of the wall is 4.5m and the breadth is 3.6m. Find the cost of white washing the wall, if the rate of white washing the wall is Rs. 20 per square meter.

ANSWER:⤵️

Dimensions of the door......

Length =2m

Breadth =1m

Area of the door = 2*1 = 2m²

Dimensions of the wall...

Dimensions of the wall... Length = 4.5m

Dimensions of the wall... Length = 4.5m Breadth = 3.6m

Dimensions of the wall... Length = 4.5m Breadth = 3.6m Area of the wall = 4.5*3.6=16.2m²

Dimensions of the wall... Length = 4.5m Breadth = 3.6m Area of the wall = 4.5*3.6=16.2m² Area for white washing = area of the wall- area of the door = 16.2-2 = 14.2m²

Given cost per m² = 20 rs

Cost of white washing = 14.2*20=280 rs

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