alleryଏକ ବୃତ୍ତାକାର ବଳୟ 21 cm ଏବଂ 14 cm ବ୍ୟାସାର୍ଦ୍ଧ ବିଶିଷ୍ଟ ବୃତ୍ତଗୁଡ଼ିକ ଦ୍ୱାରା ଆବଦ୍ଧ। ଏହାର କ୍ଷେତ୍ରଫଳ ନିର୍ଣ୍ଣୟ କରନ୍ତୁ (pi = 22/7)।
A1078 cm²
B770 cm²
C308 cm²
D462 cm²
Answer & Solution
Correct answer: B. 770 cm²
ବଳୟର କ୍ଷେତ୍ରଫଳ ହେଉଛି pi (21 squared minus 14 squared) = (22/7)(245) = 770 square centimetres।
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