a circular logo is enlarged to fit the lid of a jar . the new diameter is 10 per cent larger than the original . by what percentage has the area of the logo increased ?
"let old diameter be 4 , so radius is 2 old area = 4 π new diameter is 4.4 , so radius is 2.2 new area = 4.84 π increase in area is 0.84 π % increase in area = 0.84 / 4 * 100 so , % increase is 21 % answer will be ( e )"
multiply(divide(subtract(power(add(divide(multiply(10, const_2), const_1000), const_3), const_2), const_4), const_4), const_100)