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Start learning 50% faster. Sign in nowLet the speed of boat in still water be a km/hr and that of stream be b km/hr. Therefore, 28/(a + b)= 2 ⇒ a + b = 14 ………..(i) 28/(a – b)= 7 ⇒ a + b = 4 ………..(ii) On adding, eq (i) and (ii) ⇒ 2a = 18 km/hr ⇒ a = 9 km/hr
Which of the following is a symptom of protein-energy malnutrition (PEM)?
________carries/carry hereditary material.
Which of the following statements is incorrect about dietary fibres?
What is the primary nitrogenous waste product excreted by humans?
In angiosperms, double fertilization involves:
Monocotyledons and dicotyledons are subdivisions of which plant group?
Alveoli are related to which system of the human body?
Which of the following controls/control the growth of bollworms ?
Which of the following is NOT a symptom of Amoebiasis?