- A11
- B22
- C44
- D38.5
Step-by-Step Solution
The difference = 2πR − 2πr = 2π(R − r), and R − r is just the width, 3.5 m. So the difference = 2 × (22/7) × 3.5 = 22 m, whatever the size of the track.
Answer: B) 22
A circular track is 3.5 m wide. By how many metres is one lap along its outer edge longer than one lap along its inner edge? Take π = 22/7.
Competition practiceAreas & Volumes
Master this topic in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Areas & Volumes practice questions
More Areas & Volumes practice
Two circles of radii 21 cm and 14 cm share the same centre. Two radii drawn from that…A flower bed is the region lying between two circles of radii 14 m and 7 m drawn about…One triangle has sides 6 cm, 8 cm and 10 cm. A second triangle has sides 15 cm, 20 cm…A triangle has sides 7 cm, 24 cm and 25 cm. A second triangle is drawn with every side…A triangle has sides 26 cm, 28 cm and 30 cm. A second triangle is similar to it and has…