Question

12) Calculate the Simple Interest and Amount on ₹ 2400 for 2 years at 5% per
annum.

Answer 1

Answer:

240 Rupees , Amount =2640 rupees

Step-by-step explanation:

I = PTR/100

p= Rs. 2400

t=2years

r=5% per annum

I = (2400 * 2 * 5 )/100

I = 240 Rupees

Amount = P+I

A=2400+240

A=2640 Rupees

Answer 2

Answer :

• SI = Rs 240
• Amount = Rs 2640

Given :

• Amount on Rs 2400
• For 2 years
• At 5% per annum.

To do :

• Calculation of the Simple Interest.

We can :

Do this in two methods :

• Unitary method.
• Using formula.

Method 1

Here, Rate of interest = 5%

Therefore, Interest on Rs 100 for 1 year = Rs 5

$\rm \therefore \: Interest \: on \: Rs \: 1 \: for \: 1 \: year = Rs \: \dfrac{5}{100} \\ \\ \rm \: \therefore \: Interest \: on \: Rs \: 2400 \: for \: 1 \: year \\ \rm= Rs \: \bigg( \dfrac{5}{100} \times2400 \bigg) \\ \bf = Rs \: 120 \\ \\ \rm\therefore \: Interest \: on \: Rs \: 2400 \: \: for \: 2 \: year \\ \rm = Rs \: (120 \times2) \\ \bf = Rs \: 240$

Thus, Required Simple Interest = Rs 240

Amount = Principal + Interest

= 2400 + 240

= 2640

Method 2

( R ) Rate of interest = 5%

( P ) Principal = Rs 2400

( T ) Time = 2 years

$\rm \therefore \: Simple \: Interest \: (SI) = \dfrac{ \: P \: \times R \: \times \: T \: }{100} \\\\ = \dfrac{2400 \times 5 \times 2}{100} \\ \\ \large\bf= 240$

Therefore, Amount = Principal + Interest

= 2400 + 240

= 2640

Therefore,

• Simple Interest = Rs 240
• Amount = Rs 2640