Question

find the cost of painting the four walls of a room 10 metres long, 5 metres broad and 6 metres high at the cost of rupees 4 per square metre

Answer 1

Heya !

Here's your answer !!


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GIVEN THAT :

Length of the room = 10 m

Breadth of the room = 5 m

Height of the room = 6 m

Rate of painting per metre sq. = Rs. 4

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TO FIND :

Cost of painting of the four walls of the room.


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SOLUTION :

First we will find the area of tue four walls.

The formula to be used is :

Lateral Surface Area of the Room that is cuboidal.

LSA = 2 ( l + b ) × h

=> 2 ( 10 + 5 ) × 6

=> 2 ( 15 ) × 6

=> 30 × 6

=> 180 m^2

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The area of the four walls is 180m^2


Now, the cost of the painting :

180 × 4

=> Rs. 720 ANS


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THANKS !!