Question

find area of 4 walls of a room whose length breadth height are 7m 5m 4m respectively also find the cost of white washing if rate is rs 6 per metre

please explain with steps and formulas ‼️ ​

Answer 1

Answer:

lateral surface area of cuboidal room= lb+2bh+2hl

= 7×5+2×5×4+2×4×7

= 35+40+56

= 131 m^2

therefore, cost of washing 131 m^2 = 131×6 = 786