# The resistance of a wire is proportional to its length and inversely proportional to the square of its radius. Two wires of the same material have the same resistance and their radii are in the ratio 9 : 8. If the length of the first wire is 162 cms., find the length of the other.

1.   64cm.

2.  120cm.

3.  128cm.

4.  132cm.

4

64cm.

Explanation :
No Explanation available for this question

# A 20 liter vessel is filled with alcohol. Some of the alcohol is poured out into another vessel of an equal capacity, which is then completely filled by adding water. The mixture thus obtained is then poured into the first vessel to capacity. Then 6 2/3 liters is poured from the first vessel into the second. Both vessels now contain an equal amount of alcohol. How much alcohol was originally poured from the first vessel into the second

1.  9 liters

2.  10 liters

3.  12 liters

4.  12.5 liters

4

10 liters

Explanation :
No Explanation available for this question

# If f (x+(y/8), x-(y/8)) = xy, then f (m, n) + f (n, m) = 0

1.  only when m = n

2.  only when m ≠ n

3.  only when m = -n

4.  for all m and n

4

for all m and n

Explanation :
No Explanation available for this question

# A person closes his account in an investment scheme by withdrawing Rs. 10,000. One year ago he had withdrawn Rs. 6000. Two years ago he had withdrawn Rs. 5000 Three years ago he had not withdrawn any money. How much money had he deposited approximately at the time of opening the account 4 years ago, if the annual simple interest is 10%

1.  Rs. 15600

2.  Rs. 16500

3.  Rs. 17280

4.  None of these

4

Rs. 15600

Explanation :
No Explanation available for this question

# It takes 6 technicians a total of 10 hours to build a new server from direct computer, with each working at the same rate. If six technicians start to build the server at 11:00 am, and one technician per hour is added beginning at 5:00 pm, at what time will the server be completed

1.  6:40pm

2.  7:00pm

3.  7:20pm

4.  8:00pm

4

8:00pm

Explanation :
No Explanation available for this question

# A ship 55 kms. From the shore springs a leak which admits 2 tones of water in 6 min; 80 tones would suffer to sink her, but the pumps can throw out 12 tones an hour. Find the average rate of sailing that she may just reach the shore as she begins to sink.

1.  5.5km/h

2.  6.5km/h

3.  7.5km/h

4.  8.5km/h

4

5.5km/h

Explanation :
No Explanation available for this question

# In a 400 meter race around a circular stadium having a circumference of 1000 meters, the fastest runner and the slowest runner reach the same point at the end of the 5th minute, for the first time after the start of the race. All the runners have the same starting point and each runner maintains a uniform speed throughout the race. If the fastest runner runs at twice the speed of the slowest runner, what is the time taken by the fastest runner to finish the race

1.  20mins

2.  15mins

3.  10mins

4.  5mins

4

10mins

Explanation :
No Explanation available for this question

# A train crosses a platform 100 meters long in 60 seconds at a speed of 45 km per hour. The time taken by the train to cross an electric pole, is

1.  8 seconds

2.  1 minute

3.  52 seconds

4

52 seconds

Explanation :
No Explanation available for this question

# Two vertical lamp-posts of equal height stand on-either side of a road 50m wide. At a point P on the road between them, the elevation of the tops of the lamp-posts is 60° and 30°. Find the distance of P from the lamp post which makes angle of 60°.

1.  25m

2.  12.5m

3.  16.5m

4.  20.5m

4

12.5m

Explanation :
No Explanation available for this question

1.  Rs 7, Rs 4

2.  Rs 6, Rs 5

3.  Rs 4, Rs 7

4.  Rs 5, Rs 6

4