Question

If a:b=1:2 and b:c=4,then find a:c

Answer 1

a/b=1/2 and b/c=4/1

then.. .. a/b×b/c=. 1/2×4/1
= a/c = 2
=a:c =2

Answer 2

A/b=1/2
So b=2a

Also b/c=4
So b=4c
now 2a=4c
Thus a=2c

Here ratio a/c=2c/c. Since a=2c
So a/c=2

Therefore a:b are in the ratio 2:1