Ratios

Oct 2019
3
1
Rotherham
Can someone help me on this ratio problem? Please see below

The ratio of the sides of a triangle are:
3 : 4 : 6

The longest side has a length of 30 cm.

What is the length of the shortest side?

(Give your answer in cm)
 
Oct 2019
9
4
India
Let, lenth of side AB= 3k cm
length of side BC= 4k cm
length of side CA = 6k cm

Longest side is CA= 6k = 30cm (·.· Given)
k=5

Put k= 5 in shortest side AB.
AB=3×(5) = 15 cm.