How much distance did Shaktiman run to catch the criminal?

Question

Shaktiman saw a criminal at a distance of 10 m.
When Shaktiman started chasing him, the criminal also started running.
If the ratio of speeds of Shaktiman to criminal is 12 : 9.
Then how much distance did Shaktiman run to catch the criminal?

Answer 1

40 m

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Speed ratio is 12:9 which is equal to 4:3. For each 4 m of Shaktiman run, the distance between them reduced by 1 m.
So to reduce this by 10 m, Shaktiman run 4 m for 10 times- 4 m*10 = 40 m