Question

63. The cost of a T.V. set has risen by 20%
and has become 12,000. What is the
original price of the T.V. set ?
1) * 2,000 2) * 8,000
3) * 14,400
4) * 10,000​

Answer 1

Given that:

• Cost of TV risen by 20%
• After risen cost, cost of TV become ₹12000

To find:

• Original cost of TV

Solution:

After considering the given point, we found that cost of a TV increased by 20% and become ₹12000.

Let suppose that original cost of TV is x

Now, we can say that 120% of x is equal to ₹12000 because cost is increasing 20%.

Let solve this :-

120% of x = 12000

$\implies\sf{\dfrac{120x}{100}\:=\:12000}$

$\implies\sf{\dfrac{12x}{10}\:=\:12000}$

$\implies\sf{12x\:=\:120000}$

$\implies\sf{x\:=\:\dfrac{120000}{12}}$

$\implies\sf{x\:=\: 10000}$

Therefore,

• Original cost of TV is ₹10000(Option 4)