Class 9 Unit 7 Ex- 7.3 Q5b) A square hall is 15 m long and 5 m high. It contains three square windows each of 2 m long and two doors of size 1.5 m x 4 m. Find the total cost of plastering and colouring its walls and ceiling at Rs 50 per sq. metre and Rs 45 per sq. metre respectively.
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5b) Mensuration (iii): Cylinder and Sphere compulsory Maths solutions Vedanta publication class 9 and 10
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