Question

The prices at McDonalds rose by 15% in the period 2005 - 2008 and by 20% in the period 2008-2011. If the price of a McChicken burger is Rs.69 now, what was its price in 2005?​

Answer 1

Answer:

Price of Burger in 2005 is Rs. 50

Step-by-step explanation:

Given:

Percentage of rise from 2005 - 2008 = 15%

Percentage of rise from 2008 - 2011 = 20%

Cost price of McChicken Burger = Rs. 69

To find: Price of Burger in 2005.

let, x be the price of burger in 2005.

According to the Question,

Price of burger in 2008 = x + 15/100 × x = 23x/20

Price of burger in 2011 = 23x/20 + 20/100 × 23x/20 = 138x/100

So,

138x/100=69

138x = 69 × 100

138x = 6900

x = 6900/138

x = 50

Therefore, Price of Burger in 2005 is Rs. 50