Waec Mathematics 1997 Past Questions and Answers

Question 16:

• WAEC 1997

Calculate the total surface area of a solid cone of slant height 15cm and base radius 8cm in terms of π

A. 64πcm²
B. 12Oπcm²
C. 184πcm²
D. 200πcm²
E. 32Oπcm²

Question 17:

• WAEC 1997

The cross-section of a prism is a right-angled triangle 3cm by 4cm by 5cm. The height of the prism is 8cm. Calculate its volume

A. 48cm³
B. 6Ocm³
C. 96cm³
D. 120cm³
E. 24Ocm³

Question 18:

• WAEC 1997

Find the radius of a circle in which an arc of length 44cm subtends angle 200° at the centre of the circle. [Take π = 22/7]

A. 3.9cm
B. 12.6cm
C. 25.2cm
D. 38.4cm
E. 124.5cm

Question 19:

• WAEC 1997

The diagram above is a triangle XYZ whose area is 23.5cm². XY =1Ocm and YZ = 8cm, calculate θ correct to the nearest degree.

A. 34^o
B. 35^o
C. 36^o
D. 37^o
E. 40^o

Question 20:

• WAEC 1997

Which of the following is not necessarily sufficient for the construction of a triangle?

A. Three sides
B. Two sides and an included angle
C. Two sides and a right angle
D. Two sides and an angle
E. Two angles and a side.