Class 9

Heron’s Formula question bank (Maths)

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Q1.

The triangular side walls of a flyover have been used for advertisements. The sides of the walls are $122\, m, 22\, m$ and $120\, m$ (see Fig.). The advertisements yield an earning of $Rs. 5000$ per $m^2$ per year. $A$ company hired one of its walls for $3$ months. How much rent did it pay?

(A)

$16,50,000$

(B)

$14,50,000$

(C)

$11,50,000$

(D)

$13,50,000$

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Q2.

Sides of a triangle are in the ratio of $12 : 17 : 25$ and its perimeter is $540 \, cm$. Find its area.

(A)

$1,000 \, cm^2$

(B)

$5,000 \, cm^2$

(C)

$6,000 \, cm^2$

(D)

$9,000 \, cm^2$

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