Answer: 1:7
Explanation:
Given,
A : B = 2 : 3
B : C = 5 : 7
C : D = 3 : 10
To Find : A : D = ?
Step 1 : Find Value of B using A : B = 2 : 3
Step 2 : Substitute value of B in equation number 1 to find value of A:C ?
Step 3 : Get Value of C from equation C : D = 3 : 10
Step 4 : Substitute value of C in equation (iii)
This Gives as value of A:D = 1:7