A person deposited rs. 400 for 2 years, rs. 550 for 4 years and rs. 1,200 for 6 years at same rate of interest per annum. He received the total simple interest of rs. 1,020. The rate of interest per annum is A. 340/110 B. 340/11 C. 40/11 D. 34 /11 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=33r Case3)S.I.=1200*6*r/100=72r Total S.I. =8r+33r+72r=113r therefore 33r=1020 r=1020/331=340/11 Workspace
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