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Elementary Mathematics || Quiz-19 || CDS

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Question 1

Find the area of shaded portion if the area of quadrilateral BDEC is 380 cm2?

Question 2

If α & β are the roots of the equation x2 + Kx + K/8 = 0 such that α - β = √5. Then the value of K would be.

Question 3

Length and breadth of a rectangle are 8 cm and 6 cm respectively. The rectangle is cut on its four vertices such that the resulting figure is a regular octagon. What is the side (in cm) of the octagon?

Question 4

An interior angle of a regular polygon is 9 times its exterior angle. Calculate the number of sides of polygon?

Question 5

There are two identical circles of radius 10 cm each. If the length of the direct common tangent is 26 cm, then what is the length (in cm) of the transverse common tangent?
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Oct 26CDS & Defence