Question

14. A laboratory is 9 m long, 8 m broad and 6 m high. It has 2 doors each of size 3 m * 1.5 m and four
windows each of size 1.5 m 1 m. Find the cost of whitewashing the walls of the laboratory at the rate
of 1.75 per sq. m.​

Answer 1

Answer:

Area of walls  =2h(l+b)=2×6(17)=204m2

Area of doors  =2×3×1.5=9m2

Area of window =4×1.5×1=6m2

Area to be whitewashed  =204−9−6=189m2

Total cost     =1.75×189

              = 330.75 RS

Step-by-step explanation:

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