Question

A:B:=3:4,B:C=8:10,C:D=15:17 THEN A:B:C IS​

Answer 1

Step-by-step explanation:

A:B=3:4

B:C=8:10 or 4:5(After Simplification )

Term common to A:B and B:C is same i.e B =4

A:B:C=3:4:5

Take the third ratio C:D=15:17

Term common to A:B:C and C:D is C.Make C same in both ratio. Multiply A:B:C with 3 so A:B:C= 9:12:15

C:D=15:17

A:B:C:D=9:12:15:17

Answer 2

Answer:

(1) A convex lens can be regarded as made of a very large number of portions of triangular prisms. The bases of these prisms are towards the central thicker portion of the lens. (2) A ray of light passing through a prism bends towards its base. Hence, a convex lens converges the rays falling on it.

Step-by-step explanation:

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