• # question_answer If the length of a cylinder on heating increases by 2%, the area of its base will increase by-  A) 0.5%                 B) 2% C) 1%                                D) 4%

Length is increased by 2% $\frac{\Delta A}{A}\,=\,B\,\times \,4\theta \,=\,(\alpha \,\times \,\Delta \theta )$ Area will increase by 4%