Waec Mathematics Past Questions and Answers

Question 1486:

• WAEC 2013

Given that p^{\(\frac{1}{3}\)} = \(\frac{3\sqrt{q}}{r}\), make q the subject of the equation

A. Q = p\(\sqrt{r}\)
B. Q = p³r
C. Q = pr³
D. Q = pr^{\(\frac{1}{3}\)}

Question 1487:

• WAEC 2013

A chord is 2cm from the centre of a circle. If the radius of the circle is 5cm, find the length of the chord

A. 2\(\sqrt{21}\)cm
B. \(\sqrt{42}\)cm
C. 2\(\sqrt{19}\)cm
D. \(\sqrt{21}\)cm

Question 1488:

• WAEC 2013

A cube and cuboid have the same base area. The volume of the cube is 64cm\(^3\) while that of the cuboid is 80cm\(^3\). Find the height of the cuboid

A. 1cm
B. 3cm
C. 5cm
D. 6cm

Question 1489:

• WAEC 2013

If sin x = \(\frac{5}{13}\) and 0^o \(\leq\) x \(\leq\) 90^o, find the value of (cos x - tan x)

A. \(\frac{7}{13}\)
B. \(\frac{12}{13}\)
C. \(\frac{79}{156}\)
D. \(\frac{209}{156}\)

Question 1490:

• WAEC 2013

An object is 6m away from the base of a mast. The angle of depression of the object from the top pf the mast is 50^o, Find, correct to 2 decimal places, the height of the mast

A. 8.60m
B. 7.51m
C. 7.15m
D. 1.19m