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Question

Q.21. Mr. Mehra wants to decorate his his room with wallpaper which costs Rs. 125 per m2. If the dimensions of Mr. Mehra's room are 15 m×12 m×4 m. Find the cost of decorating the 4 walls.

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Solution

Dear Student,

Area of 4 walls of room=2×hl+bGiven that dimensions of 15×12×4here l=15,b=12 and h=4Area of 4 walls=2×4×15+12=8×27=216 m2Cost of decorating 1m2=125cost of decorating 216 m2=125×216=27000Hence total cost is 27000 Rupees

Regards,

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