The circumference of a circular pond is 88 m. Find the radius of the pond. (Take π = 227)
Need a hint?
Circumference ÷ π gives the diameter. Is that what the question asks for?
Worked answer
- Diameter = 88 ÷ 22/7 = 88 × 7/22 = 28 m.
- Radius = 28 ÷ 2 = 14 m.
Answer: 14 m
The mistake this question tests
Habit
Radius and diameter in circles
28 m is the diameter. The radius is half of it.
How to fix it at home →Wrong answers children often give:
- 28 Radius and diameter in circles
More PSLE area & volume questions
Structured · 3m
A decorative border is made of 4 identical semicircular tiles
See the answer →MCQ · 2mA circular table top has a diameter of 1.4 m
See the answer →Structured · 5mA circular lawn has a radius of 21 m
See the answer →Short answer · 2mA quarter circle has a radius of 14 cm
See the answer →MCQ · 1mThe area of a circle is 154 cm²
See the answer →Structured · 5mA rectangular metal plate measures 45 cm by 34 cm
See the answer →Practise PSLE area & volume until the mistakes stop.
Three PSLE questions, free, no sign-up. You’ll see exactly where the marks went. Then 7 days of everything for S$4.99.