Question

ii) The internal measures of a cuboidal room are 12 m × 8 m × 4 m. Find the total cost of whitewashing all four walls of a room, if the cost of white washing is ` 8 per . What will be the cost of white washing if the ceiling of the room is also whitewashed?

Answer 1

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

Answer 2

$\huge\bf{Answer:-}$

Yes

Explanation

Refer the attachment.