If a:b=3:4 and b:c=5:7, find the ratio a:c.
Show answer & explanation
Correct answer: A
Explanation
Given:
a : b = 3 : 4
b : c = 5 : 7
According to the formula:
We combine the ratios by equating the common term (b).
a : b = 3 : 4 = 15 : 20
b : c = 5 : 7 = 20 : 28
a : c = 15 : 28