# The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle (6th) number is

1.  11.5

2.  11.4

3.  11.3

4.  11.0

4

11.5

Explanation :
No Explanation available for this question

# There are 30 students in a class. The average age of the first 10 students is 12.5 years. The average age of the next 20 students is 13.1 years. The average age of the whole class is

1.  12.5 years

2.  12.7 years

3.  12.8 years

4.  12.9 years

4

12.9 years

Explanation :
No Explanation available for this question

# The perimeter of one face of a cube is 20 cm. Its volume  must be

1.  8000 cm3

2.  1000 cm3

3.  125 cm3

4.  400 cm3

4

125 cm3

Explanation :
No Explanation available for this question

# The number of revolutions made by a wheel of diameter 56 cm in covering a distance of 1.1 km is: (use π= 22/7)

1.  31.25

2.  56.25

3.  62

4.  62.5

4

62

Explanation :
No Explanation available for this question

# The length of the longest rod that can be placed in a room which is 12 m long, 9 m broad and 8 m high is

1.  27 m

2.  19 m

3.  17 m

4.  13 m

4

17 m

Explanation :
No Explanation available for this question

# The curved surface of a right circular cone of height 15 cm and base diameter 16 cm is

1.  120 π cm2

2.  60 π cm2

3.  136 π cm2

4.  68 π cm2

4

136 π cm2

Explanation :
No Explanation available for this question

# A circular well is dug to a depth of 14 metres with a diameter of 2 metres. What is the volume of the earth dug out (use π=22/7)

1.  32 cubic metres

2.  36 cubic metres

3.  40 cubic metres

4.  44 cubic metres

4

44 cubic metres

Explanation :
No Explanation available for this question

# If Ajit can do1/4 of a work in 3 days and Sujit can do1/6 of the same work in 4 days, how much will Ajit get if both work together and are paid Rs 180 in all

1.  Rs 120

2.  Rs 108

3.   Rs 60

4.  Rs 36

4

Rs 120

Explanation :
No Explanation available for this question

# Two pipes can fill a tank in 10 hours and 12 hours respectively, while the third can empty it in 20 hours. If all the pipes are opened together, then the tank will be filled in

1.  7 1/2hours

2.  10 hours

3.  8 hours

4.  91/10 hours

4

7 1/2hours

Explanation :
No Explanation available for this question

1.  6 1/3 days

2.  6 2/3 days

3.  7 days

4.  8 days

4