Cost of Exercise Books Word Problem: Unit Price Calculation

Published on July 22, 2026

Word-Problem

Learn how to calculate the cost of 8 exercise books when 10 books cost 800 naira by finding the unit price first. This word problem demonstrates basic proportion.

Question

if 10 exercise books cost 800 naira find the cost of 8 exercise books

Answer

To find the cost of 8 exercise books, we can follow these steps:

Step 1: Find the cost of one exercise book (the unit price).
Since 10 exercise books cost 800 naira, we divide the total cost by the number of books:

Step 2: Find the cost of 8 exercise books.
Now that we know one book costs 80 naira, we multiply this unit price by 8:

Final Answer:
The cost of 8 exercise books is 640 naira.

🚀 Try Free Math Help Now!🏠 Learn More Powerful Features

Related math solutions

Calculate Proportional Property Payout Between Co-Owners

Determine the fair payout for co-owner B based on their ownership percentage and co-owner A's desired sale price in a real estate scenario.

Market Equilibrium Analysis with Taxes: Supply and Demand Calculation

This problem involves calculating market equilibrium before and after a GST imposition, determining tax revenue, and analyzing deadweight loss using supply and demand functions.

Calculate Original Bill Amount Given Tip Percentage and Tip Amount

Learn how to find the original bill total when you know the tip percentage and the exact tip amount paid. Solved using basic algebra.

Permutations and Combinations: Arrangement of Identical Cans

Calculate the number of arrangements for 7 identical cans under specific conditions by treating groups of identical items as single blocks. The solution covers both restricted end positions and grouped item constraints.

Compound Interest Calculation: Annually, Quarterly, Monthly, and Continuously

Calculate the future value of an investment with compound interest applied at different frequencies: annually, quarterly, monthly, and continuously.

🔎 Explore All Shared Math Solutions