Question

The edges of the triangular board 12cm ,16cm and 20 cm. Find the cost of printing the board at the rate of 15 paise per cm square.
Solve

Answer 1

✦Question

The edges of the triangular board 12cm ,16cm and 20 cm. Find the cost of printing the board at the rate of 15 paise per cm square.

✦ANSWER.

$formula \: used$

$area \: of \: triangle = \frac{1}{2} \times b \times h$

☞NOW BACK ON QUESTION

GIVEN☞

Length =12cm

Base=16cm

hight=20cm

put in formula✍

$= \frac{1}{2} \times 16 \times 12$

$= 16 \times 6$

$96 {cm}^{2}$

Rate of printing =0.50paise per cm square

so , cost for 96cm^2 area = 0.50×96

$= 96\times .50$

$\frac{96 \times 50}{100}$

$48\: rs$

☞Hence cost of printing the board is 48 rs

Answer 2

$<h2><font color = red > hey there$

$<font color = black > here we go.....$

Using herons formula :-

$s = \frac{ a + b + c}{2}$

$s = 24cm$

$\sqrt{s(s - a)(s - b)(s - c)}$

$\sqrt{24(24 -20)(24 - 16)(24 - 12)}$

$= 96cm^2. Cost :- 96*15 = 1440/- Hope it helps you Thanks for asking........ [tex] <b > prabhudutt$