exam Maths Puzzle Numerical Ability

Divide

36a 9b 4 c/4a 6b 2c

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Please i need help on this question:

If one angle of a triangle is tree times a second angle and the third angle is 20 degrees more than the second angle, the SECOND ANGLE is..... The sum of the digits of a two-digit counting number was 9. When the digits were reversed, the new number was 45 less than the original number. What was the original number?