A biologist who has been studying herd movement in elephant just finished spending several hours with the heard. The elephants are now moving due east at 5Km/h. The biologist meanwhile is driving due west to base camp at a rate of 41km/h. In how long will the biologist be 13km/h from the herd
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- We have been given that the speed of elephants is 5km/h east and his speed is 41km/h west.
- We have to find after how long will he be 13km from the herd.
- Since the biologist is going to the west and the elephants towards east, their relative speed will be calculated by adding their respective speeds.
- So final their relative speed will be:
= 5 km/h + 41 km/h
= 46 km/h
- Now we want their distance to be 13 km and we have calculated relative speed as 46 km/h.
- So using formula :
Speed = Distance / Time,
- We calculate time as :
= Distance / Speed
= 13 / 46
= 0.28 hours
= 16.8 minutes.
- So after 16.8 minutes, biologist will be 13 km away from the herd.
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