Riya and Rakesh invested Rs 2500 and Rs 3250 into a business, and after y and 15−�" id="MathJax-Element-139-Frame" role="presentation" style="position: relative;" tabindex="0">15−�15−�" id="MathJax-Element-21-Frame" role="presentation" style="position: relative;" tabindex="0">15−�$15-�$ $15-�$ $15-�$ y) months, they invested Rs 1000 and Rs 750 more respectively. If at the end of the year, Riya received Rs 380 out of the total annual profit of Rs 800, then find the value of 'y'.