# bank

### SIMPLE INTEREST -IMPORTANT FORMULA

Principal: The money borrowed or lent out for a certain period is called the principal of the sum. Interest: Extra money paid for using other’s money is called interest. Simple Interest (S.I.): If the interest on a sum borrowed for a certain period is reckoned uniformly, then it is called […]

### PROBLEMS ON TRAINS ->IMPORTANT FORMULA

a km/hr = [a * 5/18]m/s. a m/s = [a * 18/5] km/hr. Time taken by a train of length l metres to pass a pole or a standing man or a signal post is equal to the time taken by the train to cover l metres. Time taken by […]

### PARTNERSHIP -> IMPORTANT FACTS AND FORMULA

I. Partnership: When two or more than two persons run a business jointly, they are called partners and the deal is known as partnership. II. Ratio of Division of Gains: (i) When investments of all the partners are for the same time, the gain or loss is distributed among the […]

### BOATS AND STREAMS -> IMPORTANT FACTS AND FORMULA

I. In water, the direction along the stream is called downstream. And, the direction against the stream is called upstream. II. If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then: Speed downstream = (u + v) km/hr […]

### VOLUME AND SURFACE AREA -IMPORTANT FACTS AND FORMULA

I. CUBIOD Let length = l, breadth = b and height = h units. Then, Volume = (l x b x h) cubic units. Surface area = 2 (lb + bh + lh) II. CUBE Let each edge of a cube be of length a. Then, Volume = a³ cubic […]

### PROFIT AND LOSS -IMPORTANT FACTS AND FORMULA

Cost Price: The price, at which an article is purchased, is called its cost price, abbreviated as C.P. Selling Price: The price at which an article is sold, is called its Selling Price, abbreviated as S.P. Profit or Gain: If S.P. is greater than C.P., the seller is said to […]

### TIME AND DISTANCE -IMPORTANT FACTS AND FORMULA

Speed = [Distance/Time], Time = [Distance/Speed], Distance = (Speed*Time) x km/hr = [x*5/18] m/sec. If the ratio of the speeds of A and B is a:b, then the ratio of the times taken by them to cover the same distance is 1/a : 1/b or b:a. x m/sec = [x*18/5] […]