A hole of radius 2.12 cm is drilled in a metal sheet maintained at 30^ C . The coefficient of linear expansion of the metal is 1.7 10⁻⁵ ~K ⁻¹ . The sheet is now heated to 230^ C . Then,

Options

1. Aarea of the hole decreases to 9.31 10⁻² ~cm ^2 .
2. Bthe change in the radius of the hole is 7.00 10⁻³ ~cm .
3. Carea of the hole increases by 6.65 10⁻² ~cm ^2 .
4. Dthe change in the radius of the hole is 5.00 10⁻³ ~cm .