Others Maths Puzzle

ABCD is a Square . E,F,G,H are the mid pts of the sides . j and K are the Points on HG AND GF such that Hj=2/3hg and gk=1/2gf . L is a point On EF such that Lf=1/4ef . What is the ratio of area of triangle JkL to that of the square ABCD

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Others Other Question

If f(2x+3y, 2x-7y) = 20x, then f(x,y) equals:
a. 7x-3y b. 7x+3y c. 3x-7y d. 3x+7y if the 3 real roots of the equation

x^3 + (1/sqrt p + sqrt q)x^2 + (1/sqrt p - sqrt q)x - 1 =0

are the second,fifth and eight terms of a gp,then which of the followings is true

q=0
p+2q=0
q+3p=0
p+q=0