Lateral surface area of a cube is 420 cm2 less than the lateral surface area of a cylinder. Height of cylinder is 2R cm and radius is R cm. If the side of cube is equal to the radius of the cylinder, find the approximate area of circle whose radius is (R + 3) cm.
1
314 cm2
2
290 cm2
3
340 cm2
4
388 cm2
5
225 cm2