Author: TheCompanyBoy

AREA FUNDEMENTAL CONCEPTS I.RESULTS ON TRIANGLES: 1.Sum of  the angles of a triangle is 180 degrees.   2.Sum of any

LOGARITHMS  IMPORTANT FACTS AND FORMULAE   Logarithm: If a is a positive real number, other than 1 and am =

BANKER’S DISCOUNT   IMPORTANT CONCEPTS Banker’s Discount : Suppose a merchant A buys goods worth, say Rs. 10,000 from another

­SIMPLE INTEREST    IMPORTANT FACTS AND FORMULAE 1.. Principal: The money borrowed or lent out for a certain period is

COMPOUND INTEREST   Compound Interest: Sometimes it so happens that the borrower and the lender agree to fix up a

BOATS AND STREAMS   IMPORTANT FACTS AND FORMULAE   1.In water ,the direction along the stream is called downstream and

PIPES AND CISTERNS IMPORTANT FACTS AND FORMULAE   Inlet: A pipe connected with a tank or a cistern or a

CHAIN RULE _IMPORTANT FACTS AND FORMULAE   Direct Proportion: Two quantities are said to be directly proportional, if on the

TRUE DISCOUNT   IMPORTANT CONCEPTS   Suppose a man has to pay Rs. 156 after 4 years and the rate

VOLUME AND SURFACE AREA   IMPORTANT FORMULAE   I. CUBOID Let length = 1, breadth = b and height =