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UPSC CDS I 2019 Math Paper

Question Numbers: 94-96

Consider the following for the next three (03) items :

ABCD is a quadrilateral with A

B = 9

cm, B

C = 40

cm, C

D = 28

cm, D

A = 15

cm and angle ABC is a right-angle.

Question : 94 of 100

Marks: +1, -0

Solution:

Concept:

Compute the perimeters of both triangles using given side lengths, then subtract.

Explanation:

Perimeter of

\triangle ABC = 9 + 40 + 41 = 90

cm.

Perimeter of

\triangle ADC = 28 + 15 + 41 = 84

cm.

Difference =

90 - 84 = 6

cm.

Answer:

6 cm (Option C).

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