Question 7 - End-of-Chapter Exercises - Chapter 6 Class 9 - Measuring Space: Perimeter and Area (Ganita Manjar
Last updated at June 3, 2026 by Teachoo
End-of-Chapter Exercises
Question 1
Important
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Class 9
Chapter 6 Class 9 - Measuring Space: Perimeter and Area (Ganita Manjar
- Definition (and Quesitons)
- Perimeter of Different Shapes
- Perimeter of a Circle - C/D Ratio
- Pi is Irrational
- Length of an Arc of a Circle
- Problems, Puzzles, and Paradoxes on Perimeter
- Exercise Set 6.1
- Area of Square & Rectangle
- Area of a Parallelogram
- Area of a Triangle
- Heron's Formula
- Circumcircle and Incircle of a Triangle
- Brahmagupta’s Formula for the Area of a Cyclic 4-gon
- Squaring a Rectangle
- Exercise Set 6.2
- Area of a circle
- Exercise Set 6.3
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End-of-Chapter Exercises
Transcript
Question 7 If the wheel of a bicycle has a diameter of 60 cm , find how far a cyclist will have travelled after the wheel has rotated 100 times. In 1 rotation, wheel travels distance = Circumference Circumference of wheel Diameter = 60 cm Radius of wheel = r = 60/2 = 30 cm Circumference of wheel = 2𝜋r = 2 × 𝟐𝟐/𝟕 × 30 = 1320/7 = 44 × 4 = 188.571 cm Thus, in 1 rotation the wheel travels 188.571 cm So, In 100 rotations, wheel travels = 100 × 188.571 cm = 18,857.1 cm = 18857.1/100 m = 188.571 m
