What will be the diameter of a circle whose radius is 15 cm?
What will be the radius of a circle with diameter 20cm?
A real image of half the size is obtained in a concave spherical mirror with a radius of curvature of 40cm. The distance of the object and that of its image will be
What will be the radius of a circle whose area is 9 times the area of another circle with diameter 8cm?
In a circle of radius 17 cm, two parallel chords are drawn on opposite sides of a diameter. The distance between the chords is 23 cm. If the length of one chord is 16 cm, then the length of the other is