60) Aruna cuts a cake into two halves and cuts one half into smaller pieces of equal size. Each of the small pieces is twenty grams in weight. If she has seven pieces of the cake in all with her, how heavy was the original cake?

61) Deforestation has an alarming effect on

62) Which of the following is not a characteristic of E-mail?

63) The resistance of wire varies inversely as

64) A token copper currency was introduced by