Related Questions

A reservoir has two pipes, A and B. A can fill the reservoir 5 hours faster than B. If both together fill the reservoir in 6 hours, the reservoir will be filled by A alone in-
A 8 hours
B 10 hours
C 11 hours
D 12 hours
A tea merchant blends 2 kinds of tea, putting in 3 parts of a Tk. 25 per kg grade to 1 part of a Tk. 15 per kg. If the mixture is changed to 1 part of the Tk. 25 per kg grade to 3 parts of the less expensive grade, how much will the shop lose or save in blending 200 kg?
A lose Tk. 500
B loss Tk. 1,000
C save Tk. 1,500
D save Tk. 1,000
In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of
A Relative roughness
B Absolute roughness
C Friction co-efficient for flows at equal Reynold number
D All of the above
A tank is fitted with 8 pipes, some of them that fill the tank and others that are waste pipe meant to those that empty the tank can empty it in 6 hours. If all the pipes are kept open when the tank is full, it will take exactly 6 hours for the tank to empty. How many of these are these are fill pipes?
A 2
B 4
C 6
D 5
Three-fourth petrol of a reservoir is used to fill the petrol tanks of five trucks having the same storage capacity. What part of the total capacity of the petrol reservoir did each truck receive?
A 3/20
B 4/15
C 2/15
D 1/5
Three -fourth petrol of a reservoir is used to fill the petrol tanks of five trucks having the same storage capacity, what part of the total capacity of the petrol reservoir did each truck receive?
A 320
B 415
C 215
D 15
A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is:
A 6 hours
B 10 hours
C 15 hours
D 30 hours
The hydraulic grade line is
A always above the centre line of pipe
B never above the energy grade line
C always sloping downward in the direction of flow
D all of the above
Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 20 minutes, and 10 minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P, Q and R respectively. What is the proportion of the solution R in the liquid in the tank after 3 minutes?
A $$\frac{5}{{11}}$$
B $$\frac{6}{{11}}$$
C $$\frac{7}{{11}}$$
D $$\frac{8}{{11}}$$
Three pipes can independently fill a water tank in 10,12 and 15 hours. How many hours will it take for all three pipes opened together to fill half of the tank?
A 6
B 5
C 4
D 2

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