Waec Mathematics Past Questions For Year 1990
Question 21
In the diagram above, O is the center of the circle with radius 10cm, and ∠ABC = 30°. Calculate, correct to 1 decimal place, the length of arc AC [Take π = 22/7]
- A. 5.2cm
- B. 10.5cm
- C. 13.2cm
- D. 20.6cm
- E. 31.4cm
Question 22
the area shaded with vertical lines is the solution set of the inequalities;
- A. y ≤ x, y + 2x ≤ -3
- B. y ≥ x, y + 2x ≥ - 3
- C. y ≤ x, y < 2x - 3, x ≤ 3
- D. y ≤ -x, y ≤ 2x - 3, x ≤ 3
- E. y ≥ x, y + 2x ≥ 3, x ≤ 3
Question 23
If the radius of the parallel of latitude 30°N is equal to the radius of the parallel of latitude θ°S, what is the value of θ?
- A. 75o
- B. 60o
- C. 45o
- D. 30o
- E. 0o
Question 24
calculate the surface area of a sphere of radius 7cm [Take π = 22/7]
- A. 86cm2
- B. 154cm2
- C. 616cm2
- D. 1434cm2
- E. 4312cm2
Question 25
A sector of a circle of radius 7cm has an area of 44cm2. Calculate the angle of the sector correct to the nearest degree [Take π = 22/7]
- A. 6o
- B. 26o
- C. 52o
- D. 103o
- E. 206o
