Ravi runs at a speed of 45 m/min. After 6 minutes, Siva starts chasing Ravi at a speed of 60 m/min. A dog starts running along with Siva at a speed of 80 m/min. If the dog reaches Ravi and comes back to Siva, and goes back to Ravi, and so on and so forth, until Siva meets Ravi, then find the total distance covered by the dog in metres.
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Answer:
The distance covered by dog is 360 m.
Step-by-step explanation:
Speed of Ravi = 45m/min
After 6mins distance covered by Ravi = 45×6=270m
Speed of Shiva = 60m/min
Time taken by Shiva to reach Ravi = 270/60 = 4 mins and 30 secs
Speed of dog = 80m/min
Time after which dog stops
= 4 mins and 30 secs= 4 ½ mins
Distance covered by dog
=SPEED×TIME
=80×4½ m
= 80×9/2
= 360 m
Thus, the distance covered by dog is 360 m
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