alleryএকটি আয়তক্ষেত্রের দৈর্ঘ্য বৃদ্ধি পায় 20% এবং প্রস্থ হ্রাস পায় 10%; এলাকা পরিবর্তন?
A12% বৃদ্ধি
B8% বৃদ্ধি
C8% হ্রাস
D10% বৃদ্ধি
Answer & Solution
Correct answer: B. 8% বৃদ্ধি
নতুন এলাকা হল 1.20 × 0.90 = 1.08 গুন পুরানো এলাকা, একটি 8% বৃদ্ধি।
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