Decimals and Fractions Practice Test 2

Question : 31 of 40

Marks: +1, -0

The price of commodity A increases by 40 paise every year, while the price of commodity B increases by 15 paise every year. If in 2001, the price of commodity A was Rs. 4.20 and that of B was Rs. 6.30, in which year commodity A will cost 40 paise more than the commodity B?

2013
2012
2011
2010

Validate

Solution:

Let commodity A will cost 40 paise more than B after t years.
Then,

(4.20 + 0.40t) - (6.30 + 0.15t) = 0.40

⇒ -2.10 + 0.25 t = 0.40

∴t=2.50/0.25=250/25=10

Hence, A will cost 40 paise more than B after 10 years 2001 i.e., 2011.

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