More Lessons for GCSE Maths
Examples, solutions, and videos to help GCSE Maths students learn how to solve ratio and proportion word problems.
Direct Square Proportion
Another proportion example for Higher GCSE. AQA Mod 3
The weight of a metal disc varies directly with the square of its radius. If the weight of a metal disc of radius 5 cm is 400 g, what is the weight of a similar disc of radius 9 cm.
h varies inversely as the square of r, and h = 18 when r = 4. Calculate the value of h when r = 12 and the value of r when h = 8.
Proportion & ratio
GCSE Maths Higher & Foundation revision Exam paper practice & help
Here is a list of ingredients for making 10 Flapjacks.
Work out the amount of each ingredient needed to make 15 Flapjacks.
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