Book Maths Puzzle

Mr dubey borrows Rs 100000 from the state bank of india at 11% per annum compound interest. He repays Rs 41000 at the end of the first year and Rs 47700 at the end of the second year. Find the amount outstanding at the beginning of the third year

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Book Other Question

The speed of an express train is x km/h and the speed of a ordinary train is 12 km/h less than that of express train. If the ordinary train takes 1 hr longer than the express train to cover a distance of 240 km find the speed of the express train. Find next number
2,10,20,5,81,?