Book Maths Puzzle

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?

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Book Other Question

A room 5m 44cm long and 3m 74cm broad needs to be paved with square tiles. What will be the least number of square tiles required to cover the floor? 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?