A motorist travels 90 kms distance with the speed of 60 kms/hr and the next 40 kms
distance with the speed of 40 kms/hr. What is his average speed during the journey?
1
1) 50 kms/hr. 2) 100 kms/hr.
3) 45 kms/hr.
4) 48 kms/hr.
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