In a two-digit number, if it is known that its unit's digit exceeds its ten's digit by 3 and that the product of the given number and the sum of its digits is equal to 517, then the number is:	Choose the correct choice from the following answers
A) 14	B) 36	C) 47	D) 58	E) 63
Let the ten's digit be x. Then, unit's digit = x + 3. Number = 10x + (x + 3) = 11x + 3   (11x + 3)(2x + 3) = 517   22(x)(x)+ 39x- 508 = 0   (x - 4)(22x + 127) = 0   x = 4   Hence, required number = 11x + 3 = 47.   ANSWER:47
<result>C</result>
In a two-digit number, if it is known that its unit's digit exceeds its ten's digit by 3 and that the product of the given number and the sum of its digits is equal to 517, then the number is: