Processing math: 87%

WAEC Mathematics Past Questions & Answers - Page 279

1,391.

In the diagram ST and QR are parallel. |PS| = 6cm, |SQ| = 8cm and |PR] = 18 2/3. Find |PT|

A.

7cm

B.

8cm

C.

8 2/3cm

D.

10cm

E.

10 2/3cm

View answer & explanation

Correct answer is B

No explanation has been provided for this answer.

1,392.

Two solid spheres have volumes 250cm^o and 128cm^o respectively. Find the ratio of their radii.

A.

125:64

B.

25:16

C.

2:1

D.

4:3

E.

5:4

View answer & explanation

Correct answer is E

⁴/₃πR³/⁴/₃πr³

=

250/180

= (^R/_r)³ = 5:4

1,393.

In the diagram, PQRS is a trapezium with PQ||SR. STR is a straight line, PSHQT, PTHQR. If |PQ| = 12cm and the height of the trapezium is 9cm, find its area.

A.

96cm²

B.

108cm²

C.

135cm²

D.

162cm²

E.

216cm²

View answer & explanation

Correct answer is D

A = ¹/₂(A + B)h = ¹/₂(24 + 12) x 9 = 162

1,394.

A circle has radius x cm. What is the area of a sector of the circle with angle 135°, leaving the answer in terms of x and π?

A.

$\frac{\pi x^2}{8}$

B.

$\frac{3\pi x^2}{8}$

C.

$\frac{5\pi x^2}{8}$

D.

$\frac{3\pi x}{8}$

View answer & explanation

Correct answer is B

A = ^θ ₃₆₀ x πr² = ¹³⁵ ₃₆₀ x π x x² = (3πx²)/8

1,395.

Calculate, correct to 2 significant figures, the length of the arc of a circle of radius 3.5cm which subtends an angle of 75° at the centre of the circle. [Take π = 22/7].

A.

2.3cm

B.

4.6cm

C.

8cm

D.

16cm

E.

16cm

View answer & explanation

Correct answer is B

Length of arc = $\frac{\theta}{360} \times 2\pi r$

= $\frac{75}{360} \times 2 \times \frac{22}{7} \times 3.5$

= $4.583 cm$

$\approxeq$ 4.6 cm (to 2 sig. figs)

WAEC Subjects

English Language

Agricultural Science

Physical Education

Further Mathematics

Literature in English

Islamic Religious Knowledge

Christian Religious Knowledge

Office Practice

Civic Education

Aptitude Tests

Typing Speed and Accuracy Test

Numerical Reasoning Questions and Answers

Puzzles Questions and Answers

Situational Judgement Questions and Answers

Data Interpretation Questions and Answers

Spatial Reasoning Questions and Answers

Microsoft Office Questions and Answers

Quantitative Reasoning Questions and Answers

Personality Test

Logical Reasoning Questions and Answers

Verbal Reasoning Questions and Answers

Abstract Reasoning Questions and Answers

Nigeria General Knowledge Questions and Answers

View latest jobs in Nigeria today