The difference between the simple interest received from two different

1.	The difference between the simple interest received from two different sources on Rs 1500 for 3 years is Rs 13.50. The difference between their rates of interests is (a) 0.1% (b) 0.2% (c) 0.3% (d) 0.4%
Answer» (c) 0.3% Let the two rates of simple interests p.a. be x % and y %. Then, \(\frac{1500\times{x}\times3}{100}-\frac{1500\times{y}\times3}{100}=13.50\) ⇒ 45x - 45y = 13.50 ⇒ 45(x-y) = 13.50 ⇒ x-y = \(\frac{13.50}{45}\) = 0.3%

The difference between the simple interest received from two different sources on Rs 1500 for 3 years is Rs 13.50. The difference between their rates of interests is (a) 0.1% (b) 0.2% (c) 0.3% (d) 0.4%

Answer»

(c) 0.3%

Let the two rates of simple interests p.a. be x % and y %.

Then, \(\frac{1500\times{x}\times3}{100}-\frac{1500\times{y}\times3}{100}=13.50\)

⇒ 45x - 45y = 13.50 ⇒ 45(x-y) = 13.50

⇒ x-y = \(\frac{13.50}{45}\) = 0.3%