Mathematics
An electric geyser is cylindrical in shape, having a diameter of 35 cm and height 1.2 m. Neglecting the thickness of its walls, calculate
(i) its outer lateral surface area
(ii) its capacity in litres.
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(i) How many cubic meters of soil must be dug out to make a well 20 meters deep and 2 meters in diameter ?
(ii) If the inner curved surface of the well in part (i) above is to be plastered at the rate of ₹ 50 per m2, find the cost of plastering.