Question

Sides of a triangle are in ratio of 6:7:8 and its perimeter is 420 cm find its area

Answer 1

Answer:

Given, perimeter of a triangular field is 420 m and its sides are in the ratio 6:7:8. Let sides of a triangular field be a=6x, b=7x and c=8x. and c=8×20=160m. Hence, the area of triangular field is 2100√15m2.

Step-by-step explanation:

hope that's help ✌

Answer 2

Answer:Correct option is

B

2100  

15

​

 sq m

Let sides of △ are=6x,7x and 8x

Perimeter=6x+7x+8x=21x

21x=410

x=20

Sides are 120,140 and 160 m

Area =  

S(S−A)(S−B)(S−C)

​

 [Heron's Formula]

S=  

2

120+140+160

​

=210 m

A=  

210(210−120)(210−140)(210−160)

​

=2100  

15 sq. m