Roma borrowed Rs20000 from her friend Roopa at 18% p.a. simole interest. She lent it to Radha at tue same rate but compound annually. Find her gain after 2 years.
In competition there are types of paper each of 100 marks A. Candidates obtained 62 marks in first and 70 marks in the second paper. How many marks must the candidates obtained in third paper to get an over all 65 percentage marks
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