# Decimal Fraction

## Decimal Fraction

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 Question 1
What decimal of an hour is a second ?
 A 0.0025 B 0.0256 C 0.00027 D 0.000126
Question 1 Explanation:
Required decimal =1/(60 x 60)= .00027
 Question 2
if 2994 ÷ 14.5 = 172, then 29.94 ÷ 1.45 = ?
 A 0.172 B 1.72 C 17.2 D 172
Question 2 Explanation:
29.94/1.45<==>299.4/14.5 ==>(2994/14.5)x(1/10) =172/10(via Q) = 17.2
 Question 3
.009/? = .01
 A 0.0009 B 0.09 C 0.9 D 9
Question 3 Explanation:
Let .009/x= .01; Then x =.009/.01=.9
 Question 4
3889 + 12.952 - ? = 3854.002
 A 47.095 B 47.752 C 47.932 D 47.95
Question 4 Explanation:
Let 3889 + 12.952 - x = 3854.002. Then x = (3889 + 12.952) - 3854.002 = 3901.952 - 3854.002 = 47.95.
 Question 5
The price of commodity X increases by 40 paise every year, while the price of commodity Y increases by 15 paise every year. If in 2001, the price of commodity X was Rs. 4.20 and that of Y was Rs. 6.30, in which year commodity X will cost 40 paise more than the commodity Y ?
 A 2010 B 2011 C 2012 D 2013
Question 5 Explanation:
Suppose commodity X will cost 40 paise more than Y after z years. Then, (4.20 + 0.40z) - (6.30 + 0.15z) = 0.40 ==> 0.25z = 0.40 + 2.10 ==>z =2.50/.25=250/25= 10. X will cost 40 paise more than Y 10 years after 2001 i.e., 2011.
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