Correct option is B
Given:
Loans: 1000 for 3 yrs, 1500 for 4 yrs
Total SI = 1350
Formula:
SI = (P × R × T) / 100
Solution:
Interest for first loan = 1000 × R × 3 ÷ 100 = 30R
Interest for second = 1500 × R × 4 ÷ 100 = 60R
Total = 90R = 1350 R = 1350 ÷ 90 = 15%