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Question

Find the base of a triangle whose area is 90 cm2 and height 12 cm

A
10 cm
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B
14 cm
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C
15 cm
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D
18 cm
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Solution

The correct option is A 15 cm

Given:-

Area of triangle =90cm2
Height of triangle =12cm

Let the base of the triangle be x meter.
As we know that, the area of triangle (A) is given as-

A=12×base×height.....(1)

Substituting these values in eqn(1), we have

90=12×12×x

6x=90

x=906=15cm

Hence the base of the triangle is 15cm.

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