SSC CHSL 24 Mar 2018 Shift 2 Paper

Section: English Language

Question : 21 of 100

Marks: +1, -0

If the length of one side and the diagonal of a rectangle are 8 cm and 17 cm respectively, then find its perimeter (in cm).

Solution:

Length of rectangle =

l=8

cm and diagonal =

d=17

cm
Let breadth =

b

cm
⇒

(b)^ 2 = (d)^ 2 − (l) ^2

⇒

(b) ^2 = (17)^ 2 − (8)^ 2

⇒

(b)^2 = 289 − 64 = 225

⇒

b=√225=15

cm
∴ Perimeter of rectangle =

2(l + b)

2 × (8 + 15) = 46

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