Let the speed of stream be ‘x’ km/hr. So, speed of boat in still water = 6 × x = 6x km/hr Downstream speed of boat = 6x + x = 7x km/hr According to question; 7x = 112/8 = 14 Or, x = 2 Upstream speed of the boat = 6x – x = 5x = 5 × 2 = 10 km/hr Required time taken = 90/10 = 9 hours
Lichens, the pioneer organisms that initiate ecological succession are actually a symbiotic association of
Fertiliser material that has maximum sulphur content is:
Which of the following microorganism is eliminated in canned foods?
What is the result of crossing between 7 inbred lines of India x African crosses in Pearl Millet breeding?
The term lay farming is related to-
Which regions in India are specially considered for the Special Area Games Support Programme by the Sports Authority of India?
A complete flower will always be
Guano is distinct from other organic manures because:
Deficiency of which element in soil cause chlorosis in plant
Algae are further classified into different classes based on which of the following characteristics?
