Question

Hey Dear Moderates:}

This Is To check your knowledge

Needed No spam❌❌
(else will dear reported)










In how many years will a sum of $ 800 yield an interest of $ 405 at 15% per annum​

Answer 1

Answer:

Step-by-step explanation:

Principal= 800

interest = 405

rate = 15%

interest = (principal × rate × time) ÷ 100

405 = (800 × 15 × n) ÷ 100

n = (405 × 100) ÷ (800 × 15)

n = 27 ÷ 8

n= 3years 4months 15 days

Answer 2

S O L U T I O N :

$\bf{\underline{\bf{Given\::}}}$

• Principal, (P) = Rs.800
• Simple Interest, (S.I) = Rs.405
• Rate, (R) = 15%

$\bf{\underline{\bf{Explanation\::}}}$

As we know that formula of the Simple Interest;

$\boxed{\bf{Simple\:Interest = \frac{PRT}{100} }}$

A/q

$\longrightarrow\tt{Simple-Interest =\dfrac{PRT}{100} }$

$\longrightarrow\tt{Time = \dfrac{S.I \times 100}{P \times R} }$

$\longrightarrow\tt{Time = \dfrac{405\times 100}{800 \times 15} }$

$\longrightarrow\tt{Time = \dfrac{405\times \cancel{100}}{8\cancel{00} \times 15} }$

$\longrightarrow\tt{Time = \cancel{\dfrac{405}{120}} }$

$\longrightarrow\bf{Time = 3.3\:years}$

Thus,

The years will be 3.3 years .