alleryସ୍ଥିର ଜଳରେ 15 km/h ବେଗ ଥିବା ଏକ ଡଙ୍ଗା ସ୍ରୋତର ଅନୁକୂଳରେ 40 km ଯାଏ ଏବଂ ଫେରି ଆସେ, ଯେଉଁଠାରେ ସ୍ରୋତର ବେଗ 5 km/h ଅଟେ। ମୋଟ ସମୟ କେତେ?
A8 hours
B7 hours
C5 hours
D6 hours
Answer & Solution
Correct answer: D. 6 hours
ସ୍ରୋତର ଅନୁକୂଳରେ 40 / 20 = 2 h ଏବଂ ସ୍ରୋତର ପ୍ରତିକୂଳରେ 40 / 10 = 4 h, ମୋଟ 6 hours।
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