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ATQ, Let the speed of boat 'X' in still water be ‘a’ km/hr Downstream speed of boat X = ‘a + 4’ km/hr Speed of boat Y in still water = (a + 4) km/hr According to the question, 80/(a + 4) – 80/(a + 4 + 4) = 1 Or, a2 + 12a – 288 = 0 Or, a2 + 24a – 12a – 288 = 0 Or, a(a + 24) – 12(a + 24) = 0 Or, (a – 12)(a + 24) = 0 Therefore, a = 12, -24 Speed cannot be negative Therefore, speed of boat X in still water = 12 km/hr Speed of boat Y in still water = 12 + 4 = 16 km/hr
What is an ‘Improvement felling’ in the context of forestry?
Agroforestry system where fruit trees & pasture are grown together
Practice involves cutting or heading back the main stem of a tree at a certain height from the ground level. This practice encourages the growth of new ...
What type of forest is composed of trees of different ages with more than 25% age difference permitted?
Which of the following is not a type of gymnosperm?
Which term is used to describe the cultivation method which involves clearing forest patches and cultivating crops for a few years before abandoning t...
This practice involves the removal of one-year shoots or fresh growth from the entire crown of a tree or plant. This practice is often performed to obta...
Interveinal chlorosis in young leaves is caused due to the deficiency of
ICAR- Central Agroforestry Research Institute is located at
Which of the following thinning methods starts from the suppressed class and progresses to the dominated class?
