MATHEMATICS

JAMB 2008 - Question 6

Mathematics 2008 JAMB Past Questions - Question 6: The cost of kerosene per litre increases from N60 and N85.What is the percentage rate of increases?

The cost of kerosene per litre increases from N60 and N85.What is the percentage rate of increases?
A:
B:
C:
D:
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Correct Answer

D

Explanation

To calculate the percentage rate of increase, we can use the formula:Percentage Rate of Increase = ((New Value - Old Value) / Old Value) * 100Where:Old Value = N60New Value = N85Plugging in the values, we get:Percentage Rate of Increase = ((85 - 60) / 60) * 100                          = (25 / 60) * 100                          = 41.67%Therefore, the percentage rate of increase in the cost of kerosene per liter from N60 to N85 is approximately 41.67%.To find the percentage rate of increase when the cost of kerosene per liter increases from N60 to N85, you can use the formula:Percentage Increase = ((New Value - Old Value) / Old Value) * 100%Plugging in the values:Percentage Increase = ((85 - 60) / 60) * 100%                    = (25 / 60) * 100%                    = 0.4167 * 100%                    = 41.67%So, the percentage rate of increase is 41.67%.