if 312*(2x)2=612, then the value of x is equal to

1.  -6

2.  -3

3.  3

4.  6

View Answer  
4
Correct Answer :

6


Explanation :
No Explanation available for this question

A bus overtakes two boys who are walking in the direction of the bus at 2 km/hr and 4 km/hr in 9 sec and 10sec respectively. The length of the bus and its speed are:

1.  50m and  m/s

2.  80m and  m/s

3.  70m and  m/s

4.  60m and  m/s

View Answer  
4
Correct Answer :

50m and  m/s


Explanation :
No Explanation available for this question

If ax.b=by.c=cz.a , then (xyz)3 is equal to

1.  8

2.  1/8

3.  1

4.  -1

View Answer  
4
Correct Answer :

-1


Explanation :
No Explanation available for this question

In a kilometer race, If Abhishek gives Bharti a 40m start, Abhishek wins by 19sec. But if Abhishek gives Bharti a 30 sec start, Bharti wins by 40 m. Find the time taken by Bharti to run 5,000m

1.  150 sec

2.  450 sec

3.  750 sec

4.  825 sec

View Answer  
4
Correct Answer :

750 sec


Explanation :
No Explanation available for this question

If a + b + c = 0, then the value of (xa)a2-bc.(xb)b2-ca.(xc)c2-ab is equal to

1.  -2

2.  -1

3.  0

4.  1

View Answer  
4
Correct Answer :

1


Explanation :
No Explanation available for this question

In an examination 70% students passed both in Mathematics and Physics, 85% passed in Mathematics and 80% passed in Physics. If 30 students have failed in both the subjects, then the total number of students who appeared in the examination is equal to

1.  900

2.  600

3.  150

4.  100

View Answer  
4
Correct Answer :

600


Explanation :
No Explanation available for this question

A ball is projected vertically up-wards reaches, at the end of 't' seconds, an elevation of 's' feet where s=160t−16t2. The highest elevation is

1.  800

2.  640

3.  400

4.  320

View Answer  
4
Correct Answer :

400


Explanation :
No Explanation available for this question

A man jogging inside a railway tunnel at a constant speed hears a train approaching the tunnel from behind at a speed of 30km/h, when he is one third of the way inside the tunnel. Whether he keeps running forward or turns back, he will reach the end of the tunnel at the same time the train reaches that end. The speed at which the man is running is:

1.  6 km/hr

2.  8 km/hr

3.  12 km/hr

4.  10 km/hr

View Answer  
4
Correct Answer :

10 km/hr


Explanation :
No Explanation available for this question

A boat goes 30 km. upstream and 44 km. downstream in 10 hours. In 13 hours, it can go 40 km upstream and 55 km down-stream. The speed of the boat in still water is:

1.  3 km/hr

2.  4 km/hr

3.  8 km/hr

4.  6 km/hr

View Answer  
4
Correct Answer :

8 km/hr


Explanation :
No Explanation available for this question

A passenger train covers the distance between stations X and Y, 50 minutes faster than a goods train. Find this distance if the average speed of the passenger train is 60 kmph and that of goods train is 20 kmph

1.  20 kms

2.  25 kms

3.  45 kms

4.  40 kms

View Answer  
4
Correct Answer :

25 kms


Explanation :
No Explanation available for this question
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