alleryସ୍ରୋତର ଅନୁକୂଳରେ ବେଗ 18 km/h ଏବଂ ପ୍ରତିକୂଳରେ ବେଗ 10 km/h ହେଲେ, ନଦୀ ସ୍ରୋତର ବେଗ କେତେ?
A2 km/h
B8 km/h
C14 km/h
D4 km/h
Answer & Solution
Correct answer: D. 4 km/h
ସ୍ରୋତର ବେଗ ହେଉଛି ପାର୍ଥକ୍ୟର ଅର୍ଦ୍ଧେକ, (18 - 10) / 2 = 4 km/h।
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