alleryଏକ ଡଙ୍ଗାର ସ୍ଥିର ଜଳର ବେଗ ଘଣ୍ଟା ପ୍ରତି 12 କିଲୋମିଟର ଅଟେ | ଏହା 30 କିଲୋମିଟର ଡାଉନ୍ଷ୍ଟ୍ରିମ୍ ଏବଂ 4 ଘଣ୍ଟାରେ 18 କିଲୋମିଟର ଅପଷ୍ଟ୍ରିମ୍ କୁ ଅତିକ୍ରମ କରେ | ସକରାତ୍ମକ ଷ୍ଟ୍ରିମ୍ ଗତି ଖୋଜ |
A3 km/h
B2 km/h
C1 km/h
D4 km/h
Answer & Solution
Correct answer: A. 3 km/h
ଷ୍ଟ୍ରିମ୍ ସ୍ପିଡ୍ x ପାଇଁ, 30 / (12 + x) + 18 / (12 - x) = 4 x (x - 3) = 0 କୁ ହ୍ରାସ ହୁଏ |
ସକରାତ୍ମକ ସମାଧାନ ହେଉଛି ଘଣ୍ଟା 3 କିଲୋମିଟର |
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