Question

If the sides of the triangle is doubled then its area is

Answer 1

Step-by-step explanation:

Let the salary before the increment be Rs.100. Then,

Increase in salary =Rs.10

∴ Increased salary =Rs.(100+10)=Rs.110

If increased salary is Rs. 110, original salary =Rs.100

If increased salary is Rs. 154000, original salary =Rs.(110100×154000)=Rs.140000

Hence, the salary of the man before increment was Rs.140000.

Answer 2

Answer:

Let the sides of triangle is a,b,c

Then area of triangle =

s(s−a)(s−b)(s−c)

where s=

2

1

(a+b+c)

If sides are doubled the new sides 2a,2b,2c

Then S=

2

1

(2a+2b+2c)⇒2×

2

1

(a+b+c)=2s

Then area of new triangle =$$\sqrt{S(S-2a)(S-2b)(S-2c)}= \sqrt{2s(2s-2a)(2s-2b)(2s-2c)}=\sqrt{16}s(s-a)(s-b)(s-c)= 4\sqrt{s(s-a)(s-b)(s-c)}

Then area of new triangle =4 times of old triangle

Step-by-step explanation:

I hope its help you