The problems of pipes and cisterns usually have two kinds of pipes, Inlet pipe and Outlet pipe / Leak.
Inlet : A pipe connected with a tank or a cistern or a reservoir, that fills it, is known as an inlet.
Outlet : A pipe connected with a tank or a cistern or a reservoir, emptyi...
Published: 12 Aug 2019
1. Basics
Speed = Distance / Time
Time = Distance / Speed
Distance = (Speed × Time)
2. Convert kilometres per hour(km/hr) to metres per second(m/s)
x km/hr = x * 5/18 m/sec
3. Convert metres per second(m/s) to kilometres per hour(km/hr)
x m/sec = x * 18...
Published: 12 Aug 2019
1. a km / hr = (a * 5/18) m/s.
2. a m / s = (a * 18/5) km / hr.
3. Time taken by a train of length / meters to pass a pole or a standing man or a signal post is equal to the time taken by the train to cover 1 meters.
4. Time taken by a train of length / meters to pass a stationary obje...
Published: 12 Aug 2019
1. In water, the direction along the stream is called downstream. And the direction against the stream is called upstream.
2. Let the speed of a boat in still water be u km/hr and the speed of the stream be v km/hr, then
Speed downstream = (u + v) km/hr
...
Published: 12 Aug 2019
Compound interest (or compounding interest) is interest calculated on the initial principal, which also includes all of the accumulated interest of previous periods of a deposit or loan.
P = principal amount (the initial amount you borrow or deposit)
r = annual rate of interest (as a deci...
Published: 12 Aug 2019
1. Principal : The money borrowed or lent out for a certain period is called the principal or the SUM.
2. Interest : Extra money paid for using other’s money is called interest. Interest is the extra money paid by the borrower to the owner (lender) as a form of compensation for the us...
Published: 12 Aug 2019