Mathematics 1999 Waec Past Questions and Answers

Question 26 :

• WAEC 1999

The height of a pyramid on square base is 15cm. If the volume is 80cm\(^3\), find the length of the side of the base

A. 3.3cm
B. 5.3cm
C. 4.0cm
D. 8.0cm

Question 27 :

• WAEC 1999

Simplify 3.72 x 0.025 and express your answer in the standard form

A. \(9.3\times 10^3\)
B. \(9.3\times 10^2\)
C. \(9.3\times 10^{-2}\)
D. \(9.3\times 10^{-3}\)

Question 28 :

• WAEC 1999

Two numbers 24\(_{x}\) and 31\(_y\) are equal in value when converted to base ten. Find the equation connecting x and y

A. 2x = 3(y - 1)
B. 4x - y = 1
C. 3y + 2x = 3
D. 3y = 2 (x + 3)

Question 29 :

• WAEC 1999

A car travel at x km per hour for 1 hour and at y km per hour for 2 hours. Find its average speed

A. \(\frac{2x + 2y}{3}kmh^{-1}\)
B. \(\frac{x + y}{3}kmh^{-1}\)
C. \(\frac{x + 2y}{3}kmh^{-1}\)
D. \(\frac{2x + y}{3}kmh^{-1}\)

Question 30 :

• WAEC 1999

The height and base of a triangle are in ratio 1:3 respectively. If the area of the triangle is 216 cm\(^2\), find the length of the base.

A. 24cm
B. 36cm
C. 72cm
D. 144cm