RRB Group D 3-Dec-2018 Shift 3 Solved Paper

Question : 67 of 100

Marks: +1, -0

The length of one side of a rhombus and one ofthe two diagonals are 14 cm each. The area of the rhombus is _______

\cm^2

Solution:

Given, side of rhombus = 14 cm
one diagnol

(d_1)=14cm

∴length of other diagonal =

d_2

=2√{(14)^2-7^2}=2√{196-49}

=2√{147}=14√3cm

Hence, area

=1/2×d_1×d_2

=1/2×14×14√3=98√3cm^2

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