Question

The price of a bottle of red ink is 20% more than that of a bottle of black ink .if a bottle of red ink coast 72 pause how much will a bottle of black ink coast

Answer 1

Step-by-step explanation:

Cost of red ink = 72 p

Price of red ink 20 % more than black ink = 72 x 20%

= 72 x 20 / 100

= 14.4 p

Answer 2

Answer:

The cost of a bottle of black ink is 60 paise

Step-by-step Solution:

Given data:

• The price of a bottle of red ink is 20% more than that of a bottle of black ink.
• A bottle of red ink costs 72 pause.

To find:

Cost of a bottle of black ink.

Solution:

Let the cost of a bottle of black ink is x paise.

Then by the given conditions,

72 = 20% more than x

or, 72 = x + x * 20%

or, 72 = x + 20x/100

or, 72 = x + x/5

or, 72 = 6x/5

or, 6x/5 = 72

or, x = 72 * 5 / 6

or, x = 60

Therefore, the cost of a bottle of black ink is 60 paise.