If the side of an equilateral triangle is decreased by 20%, its area is decreased by (a) 36%       (b) 40%      (c) 60%       (d) 64%

If diameter of a circle is increased by 40%, then its area increases by (a) 96% (b) 40% (c) 80% (d) 48%

If diameter of a circle is increased by 40%, then its area increases by (a) 96% (b) 40% (c) 80% (d) 48%

Decrease : 70 by 40%

If both the radius and height of a right circular cone are increased by 20%, its volume will be increased by (a) 20% (b) 40% (c) 60% (d) 72.8%

If the radius of a circle is diminished by 10%, then its area is diminished by (a) 10% (b) 19% (c) 20% (d) 36%

If the radius of a circle is diminished by 10%, then its area is diminished by (a) 10% (b) 19% (c) 20% (d) 36%

While measuring the side of an equilateral triangle an error of k % is made, the percentage error in its area is k % (b) 2k % (c) k/2% (d) 3k %

While measuring the side of an equilateral triangle an error of k % is made, the percentage error in its area is k % (b) 2k % (c) k/2% (d) 3k %

If the area of a circle decreases by 36%, then the radius of a circle decreases by