MATHEMATICS

JAMB 2019 - Question 23

Mathematics 2019 JAMB Past Questions - Question 23: The length of a notebook 15cm, was measured as 16.8cm. Calculate the percentage error to 2 significant figures.

The length of a notebook 15cm, was measured as 16.8cm. Calculate the percentage error to 2 significant figures.
A:
B:
C:
D:
Examkits App

Examkit's JAMB CBT App

Practice JAMB offline with our Online, PC and Mobile App

  • ✅ 25+ years of past questions (2000 to 2025)
  • ✅ Video solutions and explanation to questions
  • ✅ E-library
  • ✅ Study by topic
  • ✅ And more.

Correct Answer

A

Explanation

The percentage error can be calculated using the formula:\[ \text{Percentage Error} = \frac{\text{Error}}{\text{True Value}} \times 100\% \]Where the error is the absolute difference between the measured value and the true value.In this case, the true length of the notebook is 15 cm, and it was measured as 16.8 cm.The error is \( |16.8 - 15| = 1.8 \) cm.So, the percentage error is:\[ \frac{1.8}{15} \times 100\% = 12\% \]Rounding to two significant figures, the percentage error is 12.00%. Therefore, the correct answer is A. 12.00%.

Frequently Asked Questions

Examkits is a JAMB CBT practice platform that provides over 20 years of past questions, Post UTME questions, and detailed video solutions to help students prepare for their exams.

You can practice JAMB past questions online, on Android, or on a desktop using the Examkits app. Just register on our website and choose your preferred device.

Yes. Our Android and Windows versions support offline usage. Once downloaded and activated, no internet is required to use most of the features.

Yes, Examkits provides detailed video explanations for all JAMB past questions from 2000 to 2024, helping students understand how to solve each problem.

Examkits offers free practice for some subjects. However, full access requires a one-time affordable activation fee for each version of the app.