alleryএখন বাহনে 10 km পথৰ দুই-পঞ্চমাংশ 20 km/h গতিত আৰু বাকী অংশ 30 km/h গতিত অতিক্ৰম কৰে। গড় দ্ৰুতি কিমান?
A25 km/h
B26 km/h
C28 km/h
D24 km/h
Answer & Solution
Correct answer: A. 25 km/h
20-ত 4 km-ৰ বাবে 0.2 h সময় লাগে আৰু 30-ত 6 km-ৰ বাবে 0.2 h সময় লাগে, গতিকে 0.4 h-ত 10 km হ'ল 25 km/h।
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