Solved papers for JEE Main & Advanced JEE Main Online Paper (Held On 23 April 2013)

done JEE Main Online Paper (Held On 23 April 2013) Total Questions - 2

• question_answer1)                 If the curves\[\frac{{{x}^{2}}}{\alpha }+\frac{{{y}^{2}}}{4}=1\] and \[{{y}^{3}}=16x\] intersect at right angles, then a value of \[\alpha \]is:     JEE Main Online Paper ( Held On 23  April 2013 )
  A)
                    2                                           
  done clear
  B)
                                          \[4/3\]
  done clear
  C)
                                          \[1/2\]                                
  done clear
  D)
                                          \[3/4\]
  done clear
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• question_answer2)                 The cost of running a bus from A to B, is \[\operatorname{Rs}.\left( \operatorname{av}\frac{\operatorname{b}}{\operatorname{v}} \right),\] where v km/h is the cost speed of the bus. When the bus travels at 30 km /h, the cost comes out to be Rs. 75 while at 40 km/h, it is Rs. 65 Then the most economical speed (in Km/h)of the bus is :     JEE Main Online Paper ( Held On 23  April 2013 )
  A)
                    45                                        
  done clear
  B)
                                           50
  done clear
  C)
                                           60                                        
  done clear
  D)
                                           40
  done clear
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