Radii, Chord, Diameter and Circumference of the Circle
There was a race held in your school and you wanted to watch the race and went to the ground. Three people started from A, B and C and stopped at the end point. Since the starting point is different for all, you felt that the game is not fair.
However, a friend of yours told you that the radius of the track B is more than radius of track A and hence everybody runs the same distance. He then asked you to find out the radius of track B, given that the radius of track A is 14m and distance between B and the end point is 22 m (as given in the figure). What is the radius of track B.
- π units
- 2π units
- 8π units
- 4π units
Radius of a circle with centre 'O' is 5 cm. Length of the segment OD = 9 cm. Where does the point D lie?
Point D lies outside the circle
Point D lies inside the circle.
Point D lies on the circle.
Point D is the centre of the circle.
If A and B are two points on the circle, then the line joining A and B is called as the ____.
A car has to travel 0.121 km to reach from A to B. If the radius of the tyre is 7 cm. How many times will the tyre rotate while the car travels from A to B ? (Use π = 227)
Which of the following is equal to the length of the curve in red in the given circle?
If radius of a circle is halved then, ________________.
Diameter will be doubled
Diameter will be halved
Diameter will increase
Diameter will be same
Which of the following is a chord?