A slightly different one...
A certain right triangle has sides of length x, y, and z, where x < y < z. If the area of this triangular region is 1, which of the following indicates all of the possible values of y ?
A. y > √2
B. √3/2 < y < √2 ------- sq. root of 3 by 2
C. √2 / 3 < y < √3 / 2 ------- sq. root of 2 by 3 & sq. root of 3 by 2
D. √3 / 4 < y < √2 / 3 --------- sq. root of 3 by 4 and sq. root of 2 by 3
E. y < √3 / 4 ------sq. root of 3 by 4.
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x < y < z
so z is hypotenuse
hence area is is xy/2=1
so xy=2 & y>x
A. y > √2
B. √3/2 < y < √2 ------- sq. root of 3 by 2
C. √2 / 3 < y < √3 / 2 ------- sq. root of 2 by 3 & sq. root of 3 by 2
D. √3 / 4 < y < √2 / 3 --------- sq. root of 3 by 4 and sq. root of 2 by 3
E. y < √3 / 4 ------sq. root of 3 by 4.
In choices C,D,E max val of y will be less than 1, hence xy<2
eliminate these
In ch B max val of y =1.41, there may be a slight possibilty that if the value of y & x differ say the 5th or 6th decimal place this may satisfy the condition xy=2
howver it has a lower value of sqrt(3)/2 which would be less than 1 hence will not satisfy xy=2
so ans should be A
so z is hypotenuse
hence area is is xy/2=1
so xy=2 & y>x
A. y > √2
B. √3/2 < y < √2 ------- sq. root of 3 by 2
C. √2 / 3 < y < √3 / 2 ------- sq. root of 2 by 3 & sq. root of 3 by 2
D. √3 / 4 < y < √2 / 3 --------- sq. root of 3 by 4 and sq. root of 2 by 3
E. y < √3 / 4 ------sq. root of 3 by 4.
In choices C,D,E max val of y will be less than 1, hence xy<2
eliminate these
In ch B max val of y =1.41, there may be a slight possibilty that if the value of y & x differ say the 5th or 6th decimal place this may satisfy the condition xy=2
howver it has a lower value of sqrt(3)/2 which would be less than 1 hence will not satisfy xy=2
so ans should be A
Regards
Samir
Samir