alleryଗୋଟିଏ କାରର ବେଗକୁ 5 km/h ବୃଦ୍ଧି କଲେ ଏହା ଏକ 60 km ରାସ୍ତାକୁ 1 hour ପୂର୍ବରୁ ଶେଷ କରିପାରେ। ଏହାର ପ୍ରକୃତ ବେଗ କେତେ ଥିଲା?
A12 km/h
B15 km/h
C10 km/h
D20 km/h
Answer & Solution
Correct answer: B. 15 km/h
60/s - 60/(s+5) = 1 ରୁ s(s+5) = 300 ମିଳେ, ତେଣୁ s = 15 km/h।
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