Question

a cubiodal room has a length of 12 meter breadth of 8 meter and height 4 meter. If the rate of white washing is Rs.7 per square meter then how much money will be spent in painting it's 4 walls and ceilings ?​

Answer 1

Answer:

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Answer 2

Given:-

• Length (l) = 12m
• Breadth (b) = 8m
• Height (h) = 4m

To find:-

• How much money will be spent in painting it's 4 walls and ceilings ?

Formula:-

$\green{\fbox{Surface\:\:area\:=\:[2h×(l+b)]+lb}}$

Solution:-

Surface area = [2h×(l+b)]+lb

=> Surface area = [2×4×(12+8)] + 12×8 m²

=> Surface area = [8 × 20] + 72 m²

=> Surface area = 160 + 72 m²

=> Surface area = 232 m²

Cost of 1 m² = Rs. 7

:. Cost of 232 m² = Rs. 7 × 232

=> Rs. 1624$\:\:\:\:\:\:$ Ans.

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