Question

10. The sides of a triangle are in the ratio 3 : 4 : 5 and its perimeter is 24 cm. Find the area of the triangle.
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Answer 1

Step-by-step explanation:

Name of the salt Formula Salt obtained from Base

(i) Ammonium Chloride NH 4Cl NH 4OH

(ii) Copper sulphate - -

(iii) Sodium chloride NaCl NaOH

(iv) Magnesium Nitrate Mg(NO 3) 2

Answer 2

3x+4x+5x=24cm

12x=24cm

x=24/12

x=2

3x=3 x 2 =6

4x=4 x 2= 8

5x = 5 x 2 = 10

Area of Triangle:

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

$s = \frac{a + b + c}{2} = \frac{6 + 8 + 10}{2} = \frac{24}{2} = 12$

$\sqrt{12(12 - 6)(12 - 8)(12 - 10)}$

$\sqrt{12 \times 6 \times 4 \times 2}$

$\sqrt{2 \times 2 \times 3 \times 3 \times 2 \times 2 \times 2 \times 2}$

$2 \times 3 \times 2 \times 2$

$6 \times 4$

${24}cm^{2}$

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