Question

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

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Answer 1

Let lengths be = 7,5,9x
21x = 42 cm
x = 2 cm
Length of smallest ribbon = 5x = 10 cm
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Answer 2

Answer:

7x + 5x + 9 x = 42

21 x = 42

x = 2

length of the ribbons :

7*2 = 14 cm

5*2 = 10 cm

9*2 = 18 cm

Hence the smallest ribbon is of 10 cm