BabuandAsha can do a job together in 7 days. Asha is 1 (3/2) times as efficient as Babu. The same job can be done by Ash alone in

1.  49/4days

2.  49/3days

3.  11 days

4.  28/3 days

View Answer  
4
Correct Answer :

11 days


Explanation :
No Explanation available for this question

Two pipes A and B can separately fill a cistern in 60 minutes an 75 minutes respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes. Are simultaneously open then the cistern is full in 50 minutes. In how much time the third pipe alone can empty the cistern

1.  110 minutes

2.  100 minutes

3.  120 minutes

4.  90 minutes

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4
Correct Answer :

100 minutes


Explanation :
No Explanation available for this question

The value of tan 10. tan20. tan30 ,tan40 ... tan870. tan880. tan890is

1.  1/√3

2.  √3

3.  1

4.  undefined

View Answer  
4
Correct Answer :

1


Explanation :
No Explanation available for this question

Spheres A and B have their radius 40 cm and 10 cm respectively. Ratio of surface area of A to the surface area of B is

1.  1 : 16

2.  4 : 1

3.  1 : 4

4.  16 : 1

View Answer  
4
Correct Answer :

16 : 1


Explanation :
No Explanation available for this question

A cylindrical tube open at bottom ends is made of metal. The internal diameter of the tube 11.2 cm and its length is 21 cm. The metal everywhere is 0.4 ci thick. The volume of the metal (Take π= 22/7) is

1.  316 cm3

2.  310 cm3

3.  306.24 cm3

4.  280.52 cm3

View Answer  
4
Correct Answer :

306.24 cm3


Explanation :
No Explanation available for this question

If cos 2x = cos 600 cos 300+ sin 600 sin 300, then x is

1.  100

2.    150

3.    300

4.    450

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4
Correct Answer :

 

150


Explanation :
No Explanation available for this question

Let the least number of six digits which when divided by 4, 6, 10, 15 leaves in each case same remainder 2 be N. The sum of digits in N is

1.  3

2.  5

3.  4

4.  6

View Answer  
4
Correct Answer :

5


Explanation :
No Explanation available for this question

For real a, b, c if a2+b2+c2=ab+bc+ca then the value of a+c/b is

1.  1

2.  2

3.  3

4.  0

View Answer  
4
Correct Answer :

2


Explanation :
No Explanation available for this question

AB is a chord to a circle and PAT is the tangent to the circle at A. If ‹BAT =750 and ‹BAC=450, C being a point on the circle, then ‹ABC is equal to

1.  400

2.    450

3.    600

4.    700

View Answer  
4
Correct Answer :

 

600


Explanation :
No Explanation available for this question

A straight highway leads to the foot of a 50rii tall tower. From the top of the tower the angles of depression of two cars on the highway are 30° and 60°. What is the distance between the two cars

1.  100/√3m

2.  100√3m

3.  86.50m

4.  None of these

View Answer  
4
Correct Answer :

100/√3m


Explanation :
No Explanation available for this question
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