In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct answer:
Assertion (A) : The number of coins 1.9 \(cm\) in diameter and \(2 \ mm\) thick is formed from a melted cuboid \(10 \ cm \times 5.5 \ cm \times 3.5 \ cm\) is \(300\).
Reason (R): Volume of a cylinder \(= \pi r^2 h\) cubic units and area of a cuboid \(= l \times b \times h\) cubic units.