Others Maths Puzzle

a man has just enough money to buy 50 papayas or 30 watermelons. he decides to spend only 90% of his money and buy 9 watermelons. how many papayas can he buy with the remaining money that he wants to spend?

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Others Other Question

2 cars a & b start at the same time from 1 point and move along 2 roads at right angles to each other, their speeds are 36 km/hr and 48 km/hrrespectively ,after 15 sec find distance between 2 cars?? The ratio of earnings to expenditure of A is 5:3 and that of B is 7:6. If the savings of A is double that of B, then what could be the ratio of total earnings of A and B together to the total expenditure of A and B together?
(A)3:5 (B)5:3 (C)4:3 (D)2:1