Mensuration Mcqs

a. 4192 sq m

b. 4304 sq m

c. 4312 sq m

d. 4360 sq m

ANSWER: See Answer

 

Let the radii of the smaller and the larger circles be s m and l m respectively.

2∏s = 264 and 2∏l = 352
s = 264/2∏ and l = 352/2∏
Difference between the areas = ∏l2 – ∏s2
= ∏{1762/∏2 – 1322/∏2}
= 1762/∏ – 1322/∏
= (176 – 132)(176 + 132)/∏
= (44)(308)/(22/7) = (2)(308)(7) = 4312 sq m