quantitative aptitude

Question What is the average of first five natural numbers? Type multiple_choice Option 5 incorrect Option 2 incorrect Option 3 correct Option 4 incorrect Solution: Sum of first five natural numbers =1+2+3+4+5 = 15Number of quantities = 5On putting these values in formula:Average = 15/5= 3

Question Two boys start running at the same time in the same direction at a speed of 10 km/hr and 12 km/hr respectively. In what time they will be 8 km apart? Type multiple_choice Option 3 hours incorrect Option 4 hours correct Option 5 hours incorrect Option 6 hours incorrect Solution : Both the boys

Question Two pipes can fill a tank in 10 and 14 minutes respectively. A third pipe can empty the tank at the rate of10 liters/minute. If all the pipes working together can fill the empty tank in 8 minutes,what is the capacity of the tank? Type multiple_choice Option 210 liters incorrect Option 215.4 liters correct

Question A tank can be filled in 10 hours. After a leak in its bottom, it takes 12 hours to fill the tank. Find the time taken by the leak to empty the full tank? Type multiple_choice Option 45 hours incorrect Option 60 hours correct Option 50 hours incorrect Option 55 hours incorrect Solution :

Question Two pipes can fill a tank in 6 hours and 8 hours respectively. A third pipe can empty the same tank in 12 hours. If all the pipes start working together, how long it will take to fill the tank? Type multiple_choice Option 4 hours incorrect Option 4.5 hours incorrect Option 4.8 hours correct

Question Three pipes A, B and C can fill a cistern in 8 minutes,12 minutes and 16 minutes respectively. What is the time taken by three pipes to fill the cistern when they are opened together? Type multiple_choice Option 3.7 minutes correct Option 4 minutes incorrect Option 4.5 minutes incorrect Option 5 minutes incorrect Solution

Question A pipe can fill a tank in 6 hours and another pipe can empty the tank in 12 hours. If both the pipes are opened at the same time, the tank can be filled in Type multiple_choice Option 10 hours incorrect Option 12 hours correct Option 14 hours incorrect Option 16 hours incorrect Solution

Question The top of a 30 m high wall makes an angle of elevation of 60° with the top of a tower and makes an angle of depression of 45° with the bottom of the tower. Find the distance between tower and wall? Type multiple_choice Option 27 m incorrect Option 28 m incorrect Option 29

Question The angle of elevation of the top of an unfinished building at point P which is 120 m away from its base is 30°. If the angle of elevation of the finished building at the same point would be 60°, find the height of the remaining part of the building. Type multiple_choice Option 70

Question A storm breaks a tree. The broken part of tree bends so that the top of the tree touches the ground and makes an angle of 60° with the horizontal plane. If the distance between the base of the tree and the point where top of tree touches the ground is 10 m, find