Question
Pipe βAβ takes 25 minutes to fill a tank. Pipe
βBβ takes 30 minutes to empty the same tank. If pipe βBβ is opened 18 minutes after pipe βAβ, then find the total time taken to fill the tank in this manner.Solution
Let the capacity of the tank be β150β litres {LCM (25, 30)} Efficiency of pipe βAβ = (150/25) = 6 litres/minute Efficiency of pipe βBβ = (150/30) = 5 litres/minute Quantity of water filled by pipe βAβ in 18 minutes = 18 Γ 6 = 108 litres Quantity of water to be filled = 150 β 108 = 42 litres Time taken by pipe βAβ and βBβ together to fill 42 litres of water = {42/(6 β 1)} = 42 minutes Total time taken = 18 + 42 = 60 minutes
What is the name of the process by which a liquid changes into gas at all temperatures?Β Β
Two long parallel wires 2 cm apart carry 5 A and 3 A currents in the same direction. What is the force per unit length on one wire?
Which among the following is not a characteristic of transition metals?
Two spherical soap bubbles of radii r1 and r2 coalesce to form a bubble of radius R. If surface tension of soap solution is T, atmospheric pressure is P...
Which of the following is not an insulator?
Mirror formula is
Which of the following does not affect the value of acceleration due to gravity?
If lift is going up with acceleration, the apparent weight of a body is -
The pitch of a sound is primarily determined by which of the following?
A current of 5 A flows through a 10 Ξ© resistor. Find the voltage.Β Β
Relevant for Exams:
