Question

A class room is 7metre long,6metre broad and 4 metre high .The doors and windows occupy an area of 7m square .find the white washing the walls and roof at the rate of ₹ 15 per m ^square​

Answer 1

Answer:

pls

Explanation:

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Answer 2

Answer: ₹2085

Explanation:

area of 2 same wall=(length x breadth) x 2

                                =(7 x 4) x 2

                                =28 x 2

                                =56 m ^square​  

area of other 2 same wall=(length x breadth) x 2

                                          =(6 x 4) x 2

                                          =24 x 2

                                          =48 m ^square​  

area of the roof =(length x breadth)

                          =(7 x 6)

                          =42 m ^square​  

total area of room =42+48+56

                              = 146 m ^square​  

area lessed of windows= 146-7

                                       =139 m ^square

money used in white washing= 139 x 15

                                                 = ₹2085