allery5 cm ধারবিশিষ্ট একটি ঘনকের সমগ্র তলের ক্ষেত্রফল নির্ণয় করুন।
A150 cm²
B100 cm²
C125 cm²
D25 cm²
Answer & Solution
Correct answer: A. 150 cm²
একটি ঘনকের ছয়টি বর্গাকার তল থাকে, তাই ক্ষেত্রফল হল 6 x 25 = 150 square centimetres।
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