exam Maths Puzzle Numerical Ability

1} x+2y=1

2} 2x+y=5

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exam Other Question

A isosceles Trapezium of area 20 sq units is circumscribed about a circle of radius 2 units. The length of the non parallel sides of the trapezium is

a) 4.5
b) 5
c) 6
d)
y=3/4x+2...How do I solve this?