7/16th inch which is equal to 7/8miles in actual distancebacali wrote:On an aerial photograph, the surface of a pond appears as circular region of radius 7/16 inch. If a distance of 1 inch on the photograph corresponds to an actual distance of 2 miles, which of the following is the closest estimate of the actual surface area of the pond, in square miles?
A. 1.3
B. 2.4
C. 3.0
D. 3.8
E. 5.0
oa: b
no here perimeter of the pond will be circumference of a circlebhumika.k.shah wrote:Isnt the surface area of a circle =circumference of the circle= 2*pie*r?
And area of the circle = pie*r^2
]Because circumference is the "perimeter" of the circle. The area is Pi*R^2.bhumika.k.shah wrote:how would it strike to me in the exam tht i need to take the area of a circle's formula to find the surface area instead of whaat i did by taking the circumference of a circle's formula..?
how would i know that the circumference in this case would be the perimeter of the pond ?
Since the area is in square units, you need to multiply the area by the factor of 2^2, not 2.kunal_kc wrote:i did the by the following way -:
first find the area: pie x 49/256
and then multiply by the area by 2 to get in miles, and my answer is coming A
comments please
FOR 2 D's figure that is triangle,square ,rect,rhom,paralleogram,circle......etcbhumika.k.shah wrote:how would it strike to me in the exam tht i need to take the area of a circle's formula to find the surface area instead of whaat i did by taking the circumference of a circle's formula..?
how would i know that the circumference in this case would be the perimeter of the pond ?
