Question

a bike depreciates at the rate of 10% per annum and its value after 3 years is rupees 72900 find its original price​

Answer 1

Cost of bike after three years = Rs 72900

Cost of bike after two years = Rs 72900×100/90 = Rs 81000

Cost of bike after one year = Rs 81000×100/90 = Rs 90000

Current cost = Rs 90000×100/90 = Rs 100000

Answer 2

Answer:

100000 Rs is your answer mate

Step-by-step explanation:

Let the current value of the bike be x

10% of x=

$10 \div 100 \times x = x \div 10$

The value of the bike after 1 yr=

$x - (x \div 10) = 9x \div 10$

Now, 10% of 9x/10=

$10 \div 100 \times 9x \div 10 = 9x \div 100$

The value of the bike after 2yrs=

$(9x \div 10) - (9x \div 100) = 81x \div 100$

10% of 81x/100=

$10 \div 100 \times (81x \div 100) = 81 \div 1000$

Therefore, it's value after 3yrs=

$(81x \div 100) - (81x \div 1000) = 729x \div 1000$

But the value is given as 72900

B.T.P.

$729x \div 1000 = 72900$

$x = 72900 \times (1000 \div 729)$

$x = 100000$

Therefore, the original value of the bike is 100000 Rs

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