alleryগতিবেগ 5 সেকেন্ডে সুষমভাবে 20 থেকে বেড়ে 50 km/h হয়। প্রতি সেকেন্ডে বৃদ্ধি কত?
A4 km/h
B5 km/h
C6 km/h
D10 km/h
Answer & Solution
Correct answer: C. 6 km/h
5 seconds-এ বৃদ্ধি হলো 30 km/h, সুতরাং ঢাল হলো প্রতি সেকেন্ডে 6 km/h।
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