The sum of two numbers is 30 and their difference is 10. Find their product.
Choose the correct choice from the following answers
A) 104 B) 108 C) 114 D) 325 E) 200
Sol.   Let the numbers be x and y.   Then, x + y = 30 and   x - y = 10   2x = 40 +&gt; x =20 , so y = 10   x y = 20*10= 
<gadget id="calculator">20*10</gadget>
<output>200</output>
200   Answer : 200
<result>E</result>
The sum of two numbers is 30 and their difference is 10. Find their product.