Question

the length of three ribbons are in ratio 7:5:9.if the sum of the lengths of the three ribbons is 42 cm,find the length of the smallest ribbon

Answer 1

Answer:

Step-by-step explanation:

let length of all ribbon be 7x ,5x , 9x

7x + 5x + 9x = 42

21x = 42

x = 42/21

x =2

7x = 7 * 2 = 14

5x =5*2=10

9x =9*2=18

length of smallest ribbon is 10 cm