Question

if the simple interest of Rs. 400 in 10 years is Rs. 280, then the rate of interest is?​

Answer 1

Answer:

R= 7%

Step-by-step explanation:

we have been given:

P=Rs 400

SI =Rs 280

T = 10 yrs

R = ? ( to be found)

we know

SI = $\frac{P*R*T}{100}$

⇒ 280 = $\frac{400*10*R}{100}$

⇒40R = 280

∴ R = $\frac{280}{40}$

     = 7%

R= 7%

Hope it is helpful

Answer 2

Answer:

hope it helps

Step-by-step explanation:

Principle(p)= Rs. 400

Time(t) = 10 years

Simple interest(s.i) = Rs. 280

Rate of interest (r) = ?

we know,

S.I = P×T×R÷100

280=400×10×R÷100

280= 40000R÷100

Do cross multiply,

28000= 40000R

0.7% = R

Therefore the rate of interest is 0.7 per annum