1.

A car travels 90 km in `(2)1/2` hours. (a) How much time is required to cover 30 km with the same speed? (b) Find the distance covered in 2 hours with the same speed.

Answer» a)90km=2.5hrs
1km=2.5/90hrs=1/36hrs
30km=30/36=.83hrs=50min
b)2.5hrs=90km
1hr=90/2.5km=36km
1hrs=2*36=72km.


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