Mathematics Past Questions And Answers
(a) The diameter of a cylinder closed at both ends is 7cm. If the total surface area is 209cm\(^2\), calculate the height. [Take pi = 22/7].
(b) The points X and Y, 19m apart are on the same side of a tree. The angles of elevation of the top, T, of the tree from X and Y on the horizontal ground with the foot of the tree are 43º and 38° respectively.
(i) Illustrate the information in a diagram. (ii) Find, correct to one decimal place, the height of the tree.
View Discussion (0)WAEC 2022 THEORY
If y = x sinx, find dy/dx when x = π/2.
- A. -π/2
- B. -1
- C. 1
- D. π/2
The sum of the first n terms of the arithmetic progression 5, 11, 17, 23, 29, 35, ... is?
- A. n(3n - 0.5)
- B. n(3n + 2)
- C. n(3n + 2.5)
- D. n(3n + 5)
A senatorial candidate had planned to visit seven cities prior to a primary election. However, he could only visit four of the cities. How many different itineraries could be considered?
- A. 640
- B. 840
- C. 520
- D. 920
The histogram above shows the ages of victims of a pollution. How many people were involved in the pollution?
- A. 20
- B. 21
- C. 15
- D. 18
If x : y = \(\frac{1}{4} : \frac{3}{8}\) and y : z = \(\frac{1}{3} : \frac{4}{9}\), find x : z
- A. 2:3
- B. 3:4
- C. 3:8
- D. 1:2
What is the product of 0.101 and 11.1?
- A. 12.21
- B. 1.1211
- C. 1.211
- D. 0.11211
In the diagram, PQRS is a circle. find the value of x.
- A. 50°
- B. 30°
- C. 80°
- D. 100°
A radio when sold at a certain price gives a gain of 20%, what will be the gain percent if sold for 3ce the price?
- (a) 280
- (b) 270
- (c) 290
- (d) 260
In the diagram, /TP/ = 12cm and it is 6cm from O, the centre of the circle, Calculate ∠ TOP
- A. 120°
- B. 90°
- C. 60°
- D. 45°