Quantitative Aptitude for SBIPO paper 1

1.If the ages of P and R are added to twice the age of Q, the  total becomes 59. if the ages of Qand R are added to thrice the ages of  P, the total becomes 68. And if the age of P is added to the thrice the age of Q and the thrice the age of R, the total becomes 108.what is the age of P?
[1] 15 yrs     [2] ] 19 yrs    [3] ] 17 yrs    [4] ] 12 yrs    [5] None of these

2.A petrol pump owner mixed leaded and unleaded petrol in such a way that the mixture  contains 10% unleaded petrol. What quantity of leaded petrol should be added to 1 ltr  mixture so that the %  of unleaded petrol becomes 5%?
[1] 1000ml    [2]900ml    [3]1900ml    [4]1800ml  [5] None of these

3.A mat, when washed, lost 20% of its length and 10% of its breadth. What is the percentage of decrease in area?
[1]. 30 %	[2]. 28 %
[3]. 32 %	[4]. 26 %

4.If 204 ÷ 12.75 = 16, then 2.04 ÷ 1.275 = ?
[1]. 16	[2]. 1.6
[3]. 0.16	[4]. 0.016

.

5.7212 + 15.231 - ? = 6879
[1]. 359.022	[2]. 362.02
[2]. 328.221	[4]. 348.231

Answer
1.[4]
P+R+2Q = 59;
Q+R+3P= 68  AND
P+3(Q+R) = 108
solving equation , We get p= 12 yrs.


2.[1]
 in 1 ltr mixture unleaded petrol.= 100 ml    ...5%
                          leaded petrol. = 900 ml   ....95%
=>100/5*95=1900
so,quantity of leaded petrol should be added = 1900-900=1000ml

 3.[2]
Let original length = 100 and original breadth = 60
Then original area = 100 × 60 = 6000
⇒New length
New  length = 80 and breadth = 54

New area = 80*54=4320

Decrease in area = Original Area - New Area = 6000 - 4320 = 1680

Percentage of decrease in area = Decrease in Area/Original Area×100

=1680/6000×100=28%

4.[2]

5.[4]