Jamb Mathematics 2020 Past Questions and Answers

Question 31:

• JAMB 2020

The chord ST of a circle is equal to the radius r of the circle. Find the length of arc ST

A. \(\frac{\pi r}{3}\)
B. \(\frac{\pi r}{2}\)
C. \(\frac{\pi r}{12}\)
D. \(\frac{\pi r}{6}\)

Question 32:

• JAMB 2020

A sector of circle of radius 7.2cm which substends an angle of 300\(^o\) at the centre is used to form a cone. What s the radius of the base of the cone?

A. 8cm
B. 9cm
C. 6cm
D. 7cm

Question 33:

• JAMB 2020

A cylindrical tank has a capacity of 3080m\(^3\). What is the depth of the tank if the diameter of its base is 14m?

A. 25m
B. 23m
C. 22m
D. 20m

Question 34:

• JAMB 2020

The acres for rice, pineapple, cassava, cocoa and palm oil in a certain district are given respectively as 2, 5, 3, 11 and 9. What is the angle of the sector of cassava in a pie chart?

A. 180\(^o\)
B. 36\(^o\)
C. 60\(^o\)
D. 108\(^o\)

Question 35:

• JAMB 2020

Three consecutive terms of a geometric progression are give as n - 2, n and n + 3. Find the common ratio

A. \(\frac{3}{2}\)
B. \(\frac{2}{3}\)
C. \(\frac{1}{2}\)
D. \(\frac{1}{4}\)