Elitmus
Exam
Numerical Ability
Co-ordinate geometry
A regular hexagon is there. The mid points of the sides were joined and formed another hexagon.Then What is the percentage reduction in area.
Asked 13 sept......
Read Solution (Total 2)
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- Let ABCDEF be the regular hexagon with sides AB and ED parallel. P and Q are mid points of AF and EF resp.
AE=root(3) * s (s is side of hexagon)
then PQ =(root(3) * s)/2 mid point theorem
Now u know side of inner hexagon
use formula area of hexagon = (3 * root(3))2 * s^2
and find diff in area of two hexagon multiply by 100 and divide the product by area of bigger hexagon
you will get the answer.
Ans 25% - 9 years agoHelpfull: Yes(10) No(0)
- area of the bigger hexagon=6*(root(3)/4)*a^2
for the base of reduce hexagon=2*(root(3)/4)
side of reduce hexagon =root(3)/2
area of reduce hexagon=6*(root(3)/4)*((root(3)*a)/2)^2=(9*root(3)*a^2)/8
diffrece between area=(3*root(3)*a^2)/8
%reduction=(diffrence beetween area)*100/area of bigger hexagon=25% - 9 years agoHelpfull: Yes(3) No(0)
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