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Parin Sir > sir

Jun

Formulae

☼ FORMULAE :

(i) When interest is compounded K times in a year, then

A = P $\left (1 + \frac{R}{100 \times&space... </p> <div class=$

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Jun

Compound Interest

☼ Give the difference between the C. I. and S. I. by proper example.

Let, P = Rs. 1000, R = 10 % and N = 3 years.

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Jun

Index

01. Important Points On Simple Interest

02. Some important Formulas

0…

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Jun

Examples 7 to 9

(7) A shopkeeper borrowed Rs. 30000 from money lenders. For one loan he paid 10 % and for the other 15 % per annum. After one year, he paid Rs. 3600 as interest. How much did he borrow at each rate ?

Soln.

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Jun

Examples 4 to 6

(4) A certain sum amounts to Rs. 5800 in 2 years, Rs. 7400 in 6 years. Find the rate and the sum.

Soln. Here,

P + 6I = 7400
( Amount for 6 yrs. )

P + 2I = 5800

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Jun

Examples 1 to 3

(1) Find S. I. on Rs. 27000 at 7 $\frac{1}{3}$ % per annum for 3 years 8 months.

Soln. Here, P = 27000, R =

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Jun

Some important Formulas

☼ Some important Formulas :

$\large \mapsto$ A = P

e.g. Find the amount on Rs. 2000 f…

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Jun

Simple Interest

☼ Important Points On Simple Interest :

■ Principal ( or Sum or Capital ) : The money lent out or borrowed for a certain period is called the principal or the sum.

■ Interest :

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Jun

Examples 16 to 20

(16) Successive discounts of 30% and 50% is equivalent to a single discount of how many per cent ?

Soln. Let M. P. = Rs. 100

$\therefore$ …

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Jun

Examplea 11 to 15

(11) If the selling price of 16 articles is the same as the cost price of 12 articles, find loss percent.

Soln. More sell = 4 pencil. Instead of selling = 12 pencils

( for break–even point )

Instead of selling …

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