Ages 12–14🧮 Mathematics9 verified questions on this shelf
Simple formulae
Understand and use standard mathematical formulae; rearrange formulae to change the subject, performing inverse operations to isolate a different variable
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Question 1 of 3
The area of a rectangle is given by the formula A = l × w. If the area is 84 cm² and the width is 7 cm, what is the length of the rectangle?
Question 2 of 3
The period T (in seconds) of a simple pendulum is given by the formula T = 2π √(L / g), where L is the pendulum’s length (metres) and g = 9.8 m/s² is the acceleration due to gravity. Which expression correctly gives L in terms of T and g?
Question 3 of 3
The area A of a rectangle is given by the formula A = l × w, where l is the length and w is the width. Which expression correctly gives the width w in terms of A and l?
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