Paul travel at 60 km/h. After the 18 km ride found that he had forgotten an important book, his brother Thomas was behind him carrying it. How fast must Thomas go to catch up with Paul in 31 minute?

Correct answer:

v2 =  94.8 km/h

Step-by-step explanation:

s1=s2 60(6018+6031)=v26031 v2=94.8 km/h

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