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Let the distance be ‘D’ km According to the question, Downstream speed x + y = d/20 or d = 20 (x+y) .......... (i) Upstream speed x-y = d/30 or d = 30(x-y) ........... (ii) Comparing (i) & (ii) 20(x+y) = 30(x-y) 2(x+y) = 3(x-y) 2x + 2y = 3x - 3y x = 5y Hence, y = Speed of the current = 12 km/hour. Speed of boat, x = 5 × 12 = 60 km/hr
Which of the following method has highest water use efficiency?
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The process of removal of undesirable or non-productive animals from herd is called……………………
Loose smut of wheat is caused by
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The first Indian Cooperative Societies Act was passed in the year:
If a farmer aims to produce maize with higher protein content and plant geneticists recommend the Opaque 2 variant, which amino acids might the farmer e...
Which of the following seed is genetically most pure?
