The length of a rope, to which a cow is tied, is increased from 19 m to 30 m. How much additional ground will it be able to graze? Assume that the cow is able to move on all sides with equal ease. Use π = \\frac{22}{7}\\) in your calculations.
Choose the correct choice from the following answers:
A) 1696 sq m
B) 1694 sq m
C) 1594 sq m
D) 1756 sq.m
E) 1896 sq.m
Explanatory Answer   The cow can graze the area covered by the circle of radius 19m initially, as the length of the rope is 19m.   Area of a circle = π * (radius)2   Therefore, the initial area that the cow can graze = 22/7 * 19(2) sq m.   When the length of the rope is increased to 30m, grazing area becomes = 22/7 * 30(2) sq m.   The additional area it could graze when length is increased from 19m to 30m   = 22/7 * (30square - 19square) sq m.   22/7 * (30 + 19)(30 - 19) = 22/7 * 49 * 11= 
<gadget id="calculator">22/7 * 49 * 11</gadget>
<output>1_694</output>
1694 sq m.   Choice 1694 sq m
<result>B</result>
The length of a rope, to which a cow is tied, is increased from 19 m to 30 m. How much additional ground will it be able to graze? Assume that the cow is able to move on all sides with equal ease. Use π = \\frac{22}{7}\\) in your calculations.