The perimeter of two similar triangles is 36 units and 48 units. Find the ratio of their corresponding areas.
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If the standard deviation of a population is 7, what would be the population variance?
The value of cos0 deg is
Find the approximate simple interest on Rs. 2000 from March 9, 2010 to May 21, 2010 at 8.25% per annum.
What is the sum of all prime numbers between 60 and 80?
What will be the cost of levelling a circular ground of diameter 28 m, if charges are Rs. 125 per sq.m?
Slope of the side DA of the rectangle ABCD is 1/3. What is the slope of the side AB?
From the top of a building, the angles of elevation and depression of top and bottom of a tower are 60 deg and 30 deg respectively. If the height of the building is 5m, then the height of the tower is