If the distance of surface from light source is doubled then the illuminance will become
If each side of a cube is doubled, its surface area
(a) is doubled
(b) becomes 4 times
(c) becomes 6 times
(d) becomes 8 times
If each side of a cube is doubled, its surface area(a) is doubled(b) becomes 4 times(c) becomes 6 times(d) becomes 8 times
If each side of a cube is doubled then its volume