Question

the circumference of the base of a right circular cylinder is 154 cm and its height is 1.5 metre find its lateral surface area and metre square​

Answer 1

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Step by step solution:

$Given \  circumference =154 \ cm \ and \ height=1.5 \ m\\\\Let \ radius \ be \ r \ m\\\\2\pi r=154 \ cm\\\\2 \times \frac{22}{7} \times r=\frac{154}{100} \ m\\\\r=\frac{77 \times7}{100 \times22}=\frac{49}{200}=0.245 \ m\\\\ Lateral \ surface \ area \ cylinder =2\pi \times r\times h)\\\\ Lateral \ surface \ area \ cylinder =2 \times\frac{22}{7}\times0.245 \times1.5) \ m^2\\\\  Lateral \ surface \ area \ cylinder =44\times0.35\times1.5 \ m^2\\\\ Lateral \ surface \ area \ cylinder =23.1 \ m^2$

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