Question

19. A thin lens and a spherical mirror 1 point
each has a focal length of +15 cm.
1.Both are convex
2.Both are concave
3.Lens is convex and mirror is concave
4.Lens is concave and mirror is convex​

Answer 1

Answer:

3) Lens is the convex and mirror is concave

Answer 2

How many oranges should she sell for 112 rupees to gain 20% on the whole? so, 21 oranges should she sell for rupees 112 to gain 20% on the whole.