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Question

Find the height of an acute angle triangle of area 400 m2, if the base of a triangle is 20 m.

A
80 m
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B
10 m
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C
20 m
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D
40 m
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Solution

The correct option is D 40 m
Given,
Area of a triangle =400 m2
Base of a triangle=BC=20 m

Let height of a triangle be =AD=h m

Let consider a triangle ΔABC as shown.
Here BC=20 m and AD=h m

As we know,
Area of ABC=12× Base× Height

400=12×20×h

h=400×220=40 m

Option (d) is correct.

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