Question

Find the profit if CP = Rs.900 and Profit is 15%.
Find the sum which yield an interest of Rs.4500 for a time period of 3 years at a
rate of 5% p.a.

Answer 1

Answer:

Formula to calculate cost price if selling price and profit percentage are given: CP = ( SP * 100 ) / ( 100 + percentage profit). Formula to calculate cost price if selling price and loss percentage are given: CP = ( SP * 100 ) / ( 100 – percentage loss ).

Answer 2

Profit is ₹135.

The principal amount is ₹30000.

1) Given:

• Cost price is ₹900.
• Profit is 15%.

To find:

• Find the profit.

Solution:

Formula to be used:

$\bf Profit \%=\frac{SP-CP}{CP} \times 100$

Profit= SP-CP

Write the given values.

ATQ,

CP= ₹900

Profit = 15%

let the selling price of artical is ₹x.

$15 = \frac{x - 900}{900} \times 100$

$15 \times 9 = x - 900$

$x - 900 = 135$

$x = 900 + 135$

$\bf x = 1035$

The selling price is ₹1035.

Profit: $1035 - 900$

Thus,

Profit is ₹135.

2)Given:

• Simple Interest:4500
• Time= 3 years
• Rate = 5%

To find:

• Find the sum of money (Principal amount).

Solution:

Formula to be used:

$\bf SI=\frac{PRT}{100}$

Put the given values in the formula.

$4500 = \frac{P \times 5 \times 3}{100}$

$P = \frac{450000}{5 \times 3}$

$\bf P = 30000$

Thus,

The principal amount is ₹30000.

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