Mensuration - Jamb Mathematics Past Questions and Answers

Question 46:

• JAMB 1984

A cone is formed by bending a sector of a circle having an angle of 210^o. Find the radius of the base of the cone if the diameter of the circle is 12cm.

A. 12cm
B. 7.00cm
C. 1.75cm
D. 21cm
E. 3.50cm

Question 47:

• JAMB 1984

Find the area of the shaded portion of the semicircular figure.

A. \(\frac{r^2}{4}(4 \pi - 3 \sqrt{3})\)
B. \(\frac{r^2}{4}(2 \pi - 3 \sqrt{3})\)
C. \(\frac{1}{2}r^2 \pi\)
D. \(\frac{1}{8}r^2 \sqrt{3}\)
E. \(\frac{r^2}{4}(4 \pi - 3 \sqrt{3})\)

Question 48:

• JAMB 1984

In the figure, PQRSTW is a regular hexagon. QS intersects RT at V. Calculate TVS

A. 60^o
B. 90^o
C. 120^o
D. 30^o
E. 80^o

Question 49:

• JAMB 1984

In the figure, QRS is a line, PSQ = 35^o, SPR = 30^o and O is the centre of the circle. Find OQP.

A. 35^o
B. 30^o
C. 130^o
D. 25^o
E. 65^o

Question 50:

• JAMB 1984

In the figure, determine the angle marked y

A. 66^o
B. 110^o
C. 26^o
D. 70^o
E. 44^o