RRB RPF RPSF SI and CONS Model Papers 6 with solutions

Question : 82 of 120

Marks: +1, -0

The current price of a scooter is ₹ 7290. If its value decreases every year by 10%, then what was its value 3 years ago?

Solution:

(3) Let P be the value of the scooter 3 years ago. Now,

7290=P (1- {10}/{100} )^{3}=P ( {9}/{10} )^{3}

⇒ P= {7290 × 1000}/{729}=₹ 10000

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