A cylinder of 6 cm radius and height of 15 cm is wrapped by a paper exactly covering its surface area. The area of paper needed is:
সঠিক উত্তর: Option B
here, cylinders surface area= 2πrh given, radius(r)=6 cm height(h)=15 cm so, 2πrh=2x3.14x6x15=565 cm2