GATE2018 CE-1: 21

Question

A core cutter of $130$ mm height has inner and outer diameters of $100$ mm and $106$ mm, respectively. The area ratio of the core cutter (in $\%$, up to two decimal places) is _____

Answer 1

Sir verify the range from 12.3-12.4

Answer 2

Answer  12.3 to 12.4