PQRS is a rectangle. The ratio of the sides PQ and QR is 3 :

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SSC CGL Tier-2 9-March-2018 Maths Shift-2
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PQRS is a rectangle. The ratio of the sides PQ and QR is 3 :1. If the length of the diagonal PR is 10 cm, then what is the area (in cm²) of the rectangle?

[SSC CGL Tier-2 9-March-2018 Maths Shift-2]

A 15

B 10

C 45

D 20