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Ques:- If the diagonals of a rhombus are 8 cm and 10 cm respectively what will be the area of the rhombus?
A. 35 sq cm
B. 40 sq cm
C. 30 sq cm
D. 20 sq cm
E. None of these
Ques:- Gold is 19 times as heavy as water and copper is 9 times. In what ratio should these metals be mixed so that the mixture may be 15 times as heavy as water?
A. 2 : 1
B. 3 : 2
C. 4 : 3
D. 5 : 4