allery3 cm × 4 cm × 12 cm পরিমাপের একটি আয়তঘনকের দীর্ঘতম কর্ণের দৈর্ঘ্য কত?
A13 cm
B19 cm
C15 cm
D11 cm
Answer & Solution
Correct answer: A. 13 cm
কর্ণটি হলো 9 + 16 + 144-এর বর্গমূল, যা 169-এর বর্গমূল, বা 13 cm।
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