Mensuration - Jamb Mathematics Past Questions and Answers

Question 31:

• JAMB 1979

A cylinder of height h and radius r is open at one end. Its surface area is

A. 2\(\pi\)rh
B. \(\pi\)r²h
C. 2\(\pi\)rh + \(\pi\)r²
D. 2\(\pi\)rh + 2\(\pi\)r²

Question 32:

• JAMB 1979

An arc of circle of radius 2cm subtends an angle of 60^o at the centre. Find the area of the sector

A. \(\frac{2 \pi}{3}\)cm²
B. \(\frac{\pi}{2}\)cm²
C. \(\frac{\pi}{3}\)cm²
D. \(\pi\)cm²

Question 33:

• JAMB 1980

A solid cylinder of radius 3cm has a total surface area of 36\(\pi\)cm2. Find its height

A. 2cm
B. 3cm
C. 4cm
D. 5cm
E. 6cm

Question 34:

• JAMB 1980

Find the area of the curved surface of a cone whose base radius is 6cm and whose height is 8cm. (take \(\pi\) = \(\frac{22}{7}\))

A. 188.57cm²
B. 1320cm²
C. 188cm²
D. 188.08cm²
E. 10cm²

Question 35:

• JAMB 1980

Solve the equation for the positive values of \(\theta\) less than 360^o. 3 tan \(\theta\) + 2 = -1

A. 135^o or 315^o
B. 45^o or 135^o
C. 315^o or 180^o
D. 315v + 45^o
E. 360^o or 315^o