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Time taken for the first part = Distance / Speed = 60 / 30 = 2 hours. Time taken for the second part = Distance / Speed = 90 / 60 = 1.5 hours. Total distance = 60 + 90 = 150 km. Total time = 2 + 1.5 = 3.5 hours. Average speed = Total distance / Total time = 150 / 3.5 = 42.86 km/h. Correct option: a) 42.8 km/h
To prevent erosion in hills
Which of the following is not possible?
Local control is not applied for the design:
Why is replication important in experimental design?
Which city earned the nickname "Manchester of India" due to its high concentration of cotton mills?
Under distress sale, what is the relationship between marketed and marketable surplus for a farmer?
Metals generally have very high melting point. The metal which is exception to this property of metals is-
The available water retained in soil is between_?
Which of the following property of soil is not influenced by tillage operations?
Fibre optics work on the principle of –