Answer:
4.67mins or 7/90 hour
Step-by-step explanation:
[tex]Speed = \frac{distance \: travelled}{time \: taken} [/tex]
[tex]90 = \frac{7}{time \: taken} [/tex]
[tex]time \: taken \: = \frac{7}{90} [/tex]
Time taken = 7/90 hour
Time taken = (7/90) × 60mins (since 60mins make 1 hour)
Time taken = 4.67mins
