a circular logo is enlarged to fit the lid of a jar . the new diameter is 40 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 5.6 , so radius is 2.8 new area = 7.84 π increase in area is 3.84 π % increase in area = 3.84 / 4 * 100 so , % increase is 96 % answer will be ( b )"
multiply(divide(subtract(power(add(divide(multiply(40, const_2), const_1000), const_3), const_2), const_4), const_4), const_100)