maths Maths Puzzle

Q. When an antenna of input resistance 73 ohm is connected to a 50-ohm line and if the losses are ignored then its efficiency will be nearly

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maths Other Question

You have a piece of paper, 10cm by 10cm. Area = 100cm^2. For some reason, you need a square piece of paper with an area of 50cm^2. Using the paper you have, what's an easy way of getting the new square? Q. If an isolated conducting sphere in air has radius = 1/ 4pqe0 it capacitance will be