1989 - WAEC Mathematics Past Questions and Answers - page 4
31
In the diagram above, what is the size of angle ACB?
A
40o
B
50o
C
60o
D
80o
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32
With reference to the graph above, which f the following solution sets is represented by ΔOPQ?
A
y ≥ x, y ≤ 0, y + x ≥ 7
B
y ≤ x, y ≥ 0, y + x ≤ 7
C
y ≥ x, y ≥ 0, y + x ≤ 7
D
y ≤ x, y ≤ 0, y + x ≤ 7
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33
Find the volume of a cone of radius 3.5cm and vertical height 12cm [Take π = 22/7]
A
3.4cm2
B
15.5cm2
C
21.0cm2
D
42.0cm2
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34
The table above gives the scores of a group of students in an English Language test
If a student is chosen at random from the group, what is the probability that the scored at least 6 marks?
A
3/20
B
1/5
C
1/4
D
3/10
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35
The angle of a sector of a circle of diameter 8cm [Take x = 22/7].
A
93/7cm2
B
124/7cm2
C
185/7cm2
D
251/7cm2
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36
In the diagram above, O is the center of the circle QRT and PT is a tangent to the circle at T. Calculate the angle x
A
55o
B
40o
C
35o
D
25o
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37
Which of the following gives the point of intersection of the graph y = x2 and y = x + 6 shown above?
A
(0,6), (3,9)
B
(-3, 0)(2,4)
C
(-2,4)(3,9)
D
(-2,3)(-3,2)
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38
A sector is cut off from a circle radius 8.2cm to form a cone, if the radius of the resulting cone is 3.5cm, calculate the curved surface area of the cone. [take π = 22/7]
A
11.25cm2
B
12.83cm2
C
22.0cm2
D
67.2cm2
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39
If logax = p, express x in terms of a and p
A
x = u + p
B
x = a/p
C
x = p
D
x = ap
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40
Calculate and correct to three significant figures, the length of an arc subtends an angle of 70o at the center of the circle radius 4cm. [Take π = 22/7]
A
2.44cm
B
4.89cm
C
9.78cm
D
25.1cm
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