41 .
An observer 1.6 m tall is 20sq.root(3) away from a tower. The angle of elevation from his eye to the top of the tower is 30º. The heights of the tower is:
A.21.6 m
B. 23.2 m
C. 24.72 m
D.None of these
View AnswerAns: 21.6 m
42 .
Find the odd man out. 1, 4, 9, 16, 23, 25, 36
A.9
B. 23
C. 25
D.36
View AnswerAns: 23
43 .
If x + y =8 and y- x = -2, then y=
A.-2
B. 3
C. 5
D.8
View AnswerAns: 3
44 .
If r ? s= r(r-s) for all integers r and s, then 4?(3?5) equals
A.-8
B. -2
C. 2
D.40
View AnswerAns: 40
45 .
Each question has an underlined word followed by four answer choices. You will choose the word that is a necessary part of the underlined word. diploma