201 Two pipes can fill a tank in 18 minutes and 15 minutes. An outlet pipe can empty the tank in 45 minutes. If all the pipes are opened when the tank is empty, then how many minutes will it take to fill the tank? Mathematics Medium Full question → A 12 B 13 C 11 D 10
202 Three pipes of same capacity can fill a tank in 8 hours. If there are only two pipes of same capacity, the tank can be filled in___________? Mathematics Medium Full question → A 17 hours B 12 hours C 16 hours D 24 hours
203 A cistern has three pipes, A, B and C. The pipes A and B can fill it in 4 and 5 hours respectively and C can empty it in 2 hours. If the pipes are opened in order at 1, 2 and 3 A.M. When will the cistern be empty? Mathematics Medium Full question → A 3 PM B 7 PM C 4 PM D 5 PM
204 Pipes A and B can fill a cistern in 8 and 24 minutes respectively. They are opened an alternate minutes. Find how many minutes, the cistern shall be full? Mathematics Medium Full question → A 6 min B 12 min C 19 min D 10 min
205 A pipe can fill a cistern in 20 minutes whereas the cistern when fill can be emptied by a leak in 28 minutes. When both pipes are opened, find when the cistern will be full? Mathematics Medium Full question → A 60 min B 80 min C 70 min D 48 min
206 A cistern which could be filled in 9 hours takes one hour more to be filled owing to a leak in its bottom. If the cistern is full in what time will the leak empty it? Mathematics Medium Full question → A 45 hrs B 60 hrs C 75 hrs D 90 hrs
207 pipes P and Q would fill a cistern 18 and 24 minutes respectively. Both pipes being opened, find when the first pipe must be turned off so that the cistern may be just filled in 12 minutes? Mathematics Medium Full question → A after 12 mins B after 9 mins C after 8 1/2 mins D after 10 mins
208 Two pipes function simultaneously the reservoir will be filled in 12 hours. One pipe fills reservoir 10 hours faster than the other. How many hours does the faster pipe take to fill the reservoir? Mathematics Medium Full question → A 25 hrs B 28 hrs C 20 hrs D 35 hrs
209 Two pipes can separately fill a tank in 20 and 30 hours respectively. Both the pipes are opened to fill the tank but when the tank is full, a leak develops in the tank through which one-third of water supplied by both the pipes goes out. What is the total time taken to fill the tank? Mathematics Medium Full question → A 18 hrs B 16 hrs C 15 hrs D 12 hrs
210 An outlet pipe can empty 2/3 rd of a cistern in 12 minutes. In 8 minutes, what part of the cistern will be emptied? Mathematics Medium Full question → A 4/9 B 2/3 C 4/7 D 1/6
211 Two pipes A and B can separately fill a cistern in 10 and 15 minutes respectively. A person opens both the pipes together when the cistern should have been was full he finds the waste pipe open. He then closes the waste pipe and in another 4 minutes the cistern was full. In what time can the waste pipe empty the cistern when fill? Mathematics Medium Full question → A 7 min B 8 min C 9 min D 10 min
212 A leak in the bottom of a tank can empty the full tank in 6 hours. An inlet pipe fills water at the rate of 4 liters per minute. When the tank is full in inlet is opened and due to the leak the tank is empties in 8 hours. The capacity of the tank is? Mathematics Medium Full question → A 5260 liters B 5760 liters C 5846 liters D 6970 liters
213 Two pipes A and B can separately fill a tank in 12 and 15 minutes respectively. A third pipe C can drain off 45 liters of water per minute. If all the pipes are opened, the tank can be filled in 15 minutes. What is the capacity of the tank? Mathematics Medium Full question → A 480 liters B 540 liters C 600 liters D 675 liters
214 A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in? Mathematics Medium Full question → A 16 hrs B 20 hrs C 40 hrs D 25 hrs
215 If a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius, then surface area of each ball (in cm2) is________? Mathematics Medium Full question → A 100π B 7π C 60π D 50π
216 The areas of the two spheres are in the ratio 1: 4. The ratio of their volume is? Mathematics Medium Full question → A 1:4 B 1:16 C 1:8 D 1:64
217 The volumes of two cubes are in the ratio 27: 125, what shall be the ratio of their surface areas? Mathematics Medium Full question → A 6:25 B 3:5 C 9:25 D 16:25
218 What is the length of the longest pole which can be kept in a room 12 m long, 4 m broad and 3 m high? Mathematics Medium Full question → A 10 cm B 12 cm C 15 cm D 13 cm
219 Find the length of the wire required to go 15 times round a square field containing 69696 m2. Mathematics Medium Full question → A 15840 m B 16840 m C 15820 m D 15640 m
220 The edges of three iron cubes are 6cm; 8cm; 10cm respectively. A new cube was made by melting them. Find the edge of the new cube? Mathematics Medium Full question → A 8 cm B 12 cm C 14 cm D 10 cm