Question

find the base of a triangle whose area is 3.9 m square and height is 130 cm

Answer 1

Given,

h = 130 cm

= 1.3 m ...

Let base be x....

Then,

1/2 * x * 1.3 = 3.9

Hence,

x is 6 m ..

Answer 2

Given,

Area of Triangle = 3.9m²
Height = 130 cm
Converting height into metres = $\frac{130}{100}$ = 1.3 m

We know that,

$\boxed{\mathbf{Area \: of \: Triangle = \frac{1}{2} b × h}}$

Putting the values in the formula we get,

$3.9 = \frac{1}{2} \times b \times 0.130 \\ \\ b = \frac{39}{10} \times \frac{2}{1} \times \frac{10}{13} \\ \\ b = 3 \times 2 \\ \\ \bf b = 6m$