Question

the internal measure of a cuboidal room are 12 m into 8 m into 4 m find the rate of white washing all the four walls of the room if the total cost of whitewashing is 1280.

Answer 1

Answer:

2(l+b)h = LSA

2(12+8)4 =2(20)4 = 40*4 = 160m²

cost of whitewashing 4 walls =160*8 = Rs 1280

area of 5 walls = LSA+ l*b

                       = 160 + (12*8)

                       = 160 + 96

                       = 256m²

cost of whitewashing vd ceiling = Rs 1280 +(96*8)

                                                 = Rs 1280 + 768

                                                 = Rs 2048

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Step-by-step explanation:

Answer 2

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Yes

Explanation

Refer the attachment.