31.Which of the following zones has the longest route in kilometres ?

32.What is the principal reason for the dense population in North - West Europe and North - East America ?

33.For the manufacture of paper, the raw material used in the largest quantity is

34.Afric remained a sparsely populated region for a long time, to be called a ""dark continent"".Which of the following was a reason for Africa to remain uninhabited ?

35.The territorial limit of Littoral States for exploitation of oil and gas in the seas under the recently concluded treaty regulating the use of high seas under International Law is