A sum of ₹800 invested on simple interest becomes ₹1200 in 8 years. What will be simple interest for 6 years on the sum at the same rate of interest?

₹300

Simple interest for 8 years = 1200 - 800 = 400

Simple interest for 1 years = \(\frac{400 }{8 }\) = 50

Simple Interest =  \(\frac{Principal ×Rate × Time }{100}\)

50 = \(\frac{800 × Rate × 1 }{100}\)

Rate = 6.25%

Now , Simple interest for 6 years

=  \(\frac{800 × 6.25 × 6}{100}\)

= Rs. 300