A rectangular field has a length 10 meters more than it is width. If the area of the field is 171, what is the length (in meters) of the rectangular field? Choose the correct choice from the following:	A) 17	B) 19	C) 21	D) 23	E) 25
area = l * w = (L) * (L-10) = 171   trial and error:    20*10= 
<gadget id="calculator"> 20*10</gadget>
<output>200</output>
200 (too high)   19*9= 
<gadget id="calculator">19*9</gadget>
<output>171</output>
171   The length is 19 meters.   The answer is 19.
<result>B</result>
A rectangular field has a length 10 meters more than it is width. If the area of the field is 171, what is the length (in meters) of the rectangular field?