Ratio, proportion and rate - Jamb Mathematics Past Questions and Answers

Question 46:

• JAMB 2020

Four boys and ten girls can cut a field first in 5 hours. If the boys work at \(\frac{5}{4}\) the rate at which the girls work, how many boys will be needed to cut the field in 3 hours?

A. 180
B. 60
C. 25
D. 20

Question 47:

• JAMB 2021

Three brothers in a business deal share the profit at the end of a contract. The first received \(\frac{1}{3}\) of the profit and the second \(\frac{2}{3}\) of the remainder. If the third received the remaining N12000.00 how much profit did they share?

A. N60 000.00
B. N54 000.00
C. N48 000.00
D. N42 000.00

Question 48:

• JAMB 2021

The ratio of the length of two similar rectangular blocks is 2 : 3. If the volume of the larger block is 351cm\(^3\), then the volume of the other block is?

A. 234.00 cm³
B. 526.50 cm³
C. 166.00 cm³
D. 687cm³