Book Maths Puzzle

A tank is 25 m long, 12 m wide and 6 m deep. What is the cost of plastering of its walls and bottom at the rate of 75 paise per sq. m?

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Book Other Question

The diagonal of the floor of a rectangular room is feet. The shorter side of the room is 4 feet. What is the area of the room? It is decided to construct a 2 metre broad pathway around a rectangular plot on the inside. If the area of the plots is 96 sq.m. and the rate of construction is Rs. 50 per square metre., what will be the total cost of the construction?