a circular logo is enlarged to fit the lid of a jar . the new diameter is 30 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 5.2 , so radius is 2.6 new area = 6.76 π increase in area is 2.76 π % increase in area = 2.76 / 4 * 100 so , % increase is 69 % answer will be ( c )"
multiply(divide(subtract(power(add(divide(multiply(30, const_2), const_1000), const_3), const_2), const_4), const_4), const_100)