Question

Mohan runs a sweets shop. Every year he increases price of all the products by 5% of the previous year's price.
In 2007, price of one kilogram of 'laddoo' was 400 Rs. What will be the price in 2009?

Answer 1

Answer:

440 will be the price of one kilogram in 2009

Answer 2

Answer is 441

explanation

For 1 year

Principal = 400

Rate = 5%

Time = 1 year

for 2 years

principal = 400

rate = 5%

Time= 2 years

FORMULA

Principle(1 × r/100)^time

=

$400(1 \times \frac{5}{100}) ^{2}$

$400( \frac{105}{100} )^{2}$

$400( \frac{21}{20} ) ^{2}$

$400 \times \frac{21}{20} \times \frac{21}{20}$

now 400 will be divided by 20 the answer will be 20

Then again 20 will be divided by 20 answer will be 1

then digits left are 21×21

THAT IS 441

Price of laddus in the year 2009 will be ₹441