Question

In how many years does the sum of 1200 rs.become 1800rs.at the rate of simple interest of 5% per annum?

Answer 1

Answer:

a simple interest is is equals to = prt/100

now you can find this easily.

Answer 2

$\Large{\textsf{\textbf{\underline{\underline{ 10 years . \::}}}}}$

Step-by-step explanation:

Given that:

• Sum = Rs 1200
• Amount = Rs 1800
• Rate of interest = 5% per annum

To Find:

• Time

Formula used:

• SI = A - P
• SI = (P × R × T)/100

Where,

• SI = Simple interest
• A = Amount
• P = Sum/Principal
• R = Rate of interest
• T = Time

First we have to find simple interest:

⇒ SI = A - P

⇒ SI = Rs 1800 - Rs 1200

⇒ SI = Rs 600

∴ Simple interest = Rs 600

Now finding the time:

⇒ SI = (P × R × T)/100

⇒ 600 = (1200 × 5 × T)/100

⇒ 600 = 6000T/100

⇒ 600 = 60T

⇒ T = 600/60

⇒ T = 10

$\small{\textsf{\textbf{\underline{\underline{∴ Time = 10 years\::}}}}}$