Question

Snehal has a red ribbon that is 80 cm long and a blue ribbon, 2.20 m long. What is the ratio of the length of the red ribbon to that of the blue ribbon?

Answer 1

Length of red ribbon = 80 cm

Length of blue ribbon = 2.20 m = 2.20 × 100 = 220 cm

∴ Ratio of the length of the red ribbon to that of the blue ribbon = Length of red ribbon : Length of blue ribbon

= 80 cm : 2.20 m

= 80 cm : 220 cm

= `80/220`

= `(80 div 20)/(220 div 20)`  (HCF of 80 and 220 = 20)

= `4/11`

= 4 : 11

Thus, the ratio of the length of the red ribbon to that of the blue ribbon is `4/11` or 4 : 11.