# The dimensions of

Given,

Dimensions of room = 12.5m ×9m × 7m

Dimensions of each door = 2.5m ×1.2m

Dimensions of each window = 1.5m ×1m

Area of four walls including doors and windows = = Area of 2 doors and 4 windows = Area of only walls = 301 – 12 = 289 m2

Hence,

Cost of painting walls at rate Rs.3.50 per square metre = Rs.(3.50 ×289) = Rs.1011.50

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