SSC CHSL 4 Mar 2018 Shift 1 Paper

Section: General Awareness

Question : 96 of 100

Marks: +1, -0

If the length of one side and the diagonal of a rectangle are 7 cm and 25 cm respectively, then find its perimeter (in cm).

Solution:

Let be the length of rectangle and breadth =

b=7

cm
Diagonal of rectangle =

d=25

cm
⇒

(l)^ 2 = (d) ^2 − (b) ^2

⇒

(l)^ 2 = (25) ^2 − (7) ^2

⇒

(l)^2 = 625 − 49 = 576

⇒

l=√576=24

cm
∴ Perimeter of rectangle =

2(l + b)

2(24+7)=2×31=62

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