JAMB Mathematics Past Questions & Answers - Page 122

606.

In the figure, PQR is a semicircle while PQ and QR are chords. QS is the perpendicular from Q to the diameter PR. What is the expression for QS?

A.

QS = PS\(\sqrt{SR}\)

B.

QS = \(\sqrt{(PS SR)}\)

C.

QS = 2\(\sqrt{(PS SR)}\)

D.

QS = \(\frac{1}{\sqrt{2}}\)\(\sqrt{(PS SR)}\)

Correct answer is B

No explanation has been provided for this answer.

607.

In the figure, TSP = 100° and PRQ = 20°. Find PQR.

A.

140o

B.

120o

C.

75o

D.

30o

Correct answer is A

PSR = 80°

\(\therefore\) SRP = 20°

\(\implies\) RPQ = 20°

x = 140°

608.

The sketch is the curve of y = ax2 + bx + c. Find a, b and c respectively

A.

1, 0, -4

B.

-2, 2, -4

C.

0, 1, -4

D.

2, -2, -4

E.

2, -2, -4

Correct answer is A

Given the graph and the curve y = ax2 + bx + c the roots are x - 2 and 2 while its equation (x + 2)(x - 2) = y

y = x2 - 4 i.e. y = x2 + 0x - 4

a = 1, b = 0 and c = -4

609.

Find the volume of the figure

A.

\(\frac{a \pi^2}{3} (x + 3y) \)

B.

a\(\pi ^2\)y

C.

\(\frac{a \pi ^2}{3}\)(y + x)

D.

(\(\frac{1}{3} a \pi ^2 x + y\))

Correct answer is A

No explanation has been provided for this answer.

610.

In the figure, PQRS is a square of sides 8cm. What is the area of \(\bigtriangleup\)UVW?

A.

64 sq. cm

B.

40 sq.cm

C.

50 sq.cm

D.

10 sq.cm

Correct answer is D

No explanation has been provided for this answer.