In a triangle if the square on one side is equal to yhe sum of the square on the reamaining two,prove that the angle opposite to the first side is a right angle
A container open at the top ,is in the form of a frustum of a cone of height 24cm with radii of its tower and upper ends has 8cm and 20cm respectively . Find the cost of milk which can completely tin the container at the rate of ₹21per litter
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