₹500 is invested at 12% per annum simple interest, and a certain sum is invested at 10% per annum simple interest. If the total interest on both sums after 4 years is ₹480, what is the second sum?

₹500 is invested at 12% per annum simple interest, and a certain sum is invested at 10% per annum simple interest. If the total interest on both sums after 4 years is ₹480, what is the second sum?
500 रुपये 12% प्रति वर्ष साधारण ब्याज पर निवेश किए गए और एक निश्चित राशि 10% प्रति वर्ष साधारण ब्याज पर निवेश की गई। यदि 4 वर्षों के बाद दोनों राशियों पर ब्याज का योग 480 रुपये है, तो बाद वाली राशि क्या होगी?