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** Q 2451767624. ** Aryan runs at a speed of 40 metres/minute. Rahul

follows him after an interval of 5 minutes and runs at

a speed of 50 metres/minute. Rahul's dog runs at a

speed of 60 metres/minute and starts along with

Rahul. The dog reaches Aryan and then comes back

to Rahul, and continues to do so till Rahul reaches

Aryan. What is the total distance covered by the dog?

**IAS 2005 Prelims **