The height of a triangle is decreased by 15% and its base increased by 50%. Its area will
Choose the correct choice from the following answers:
A) decrease by 12.5%  B) increase by 12.5%  C) decrease by 25%  D) Increase by 27.5%  E) None of these
Explanation :   Let the initial height be 100 and the base be 200 units.   âˆ´ Area = 1/2 x 100 x 200 = 10000 sq units   Now, height = 85 units and base = 300 units   âˆ´ New area = 1/2 x 85 x 300 = 12750   âˆ´ Area is increased by (12750 - 10000)/10000 x 100   = 27.5%   Answer : Option Increase by 27.5%
<result>D</result>
The height of a triangle is decreased by 15% and its base increased by 50%. Its area will