A person deposited Rs. 400 for 2 years, Rs. 550 for 4 years and Rs. 1200 for 6 years. He received the total simple interest of Rs. 1020. The rate of interest per annum is (rate of interest in each case is same) A. 5% B. 10% C. 15% D. 20% Answer Workspace Report Discuss Answer with explanation Answer: Option B Explanation Case 1)S.I.=400*2*r/100=8r Case 2)S.I.=550*4*r/100=22r Case3)S.I.=1200*6*r/100=72r Total S.I. =8r+22r+72r=102r therefore 102r=1020 r=1020/102=10 r=10 Workspace
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