Let the distance be x km. Speed upstream = 12 – 6 = 6 km/hr Speed downstream = 12 + 6 = 18 km/hr ⇒ x/6 + x/18 = 1 ⇒ (3x + x)/18 = 1 ⇒ 4x = 18 ⇒ x = 18/4 = 4.5 km
Most commonly used fungicide for seed treatment is:
Azolla is used in cultivation of:
“Brown heart” of turnips and “hollow stem” in brassicas is due to the deficiency of
In Ca and S deficient soils, gypsum placement should be done at
Which of the following is correct with respect to animal cell?
“Regional Centre of International Rice Research Institute” is recently established in India at:
Cell is the basic building block of life. Cell theory was put forward by?
Plant hormone of nucleotide origin
Potassium in Muriate of Potash (MOP) is present in the form of
Which of the following pair is not correctly matched?
