Question
A person is to reach a destination 40 km away. If he
covers the first 25 km in 4 hours then at what constant speed should he go so that the average speed for the whole journey becomes 8 km/hour?Solution
ATQ, 
Therefore, the person should maintain a constant speed of 15 km/hour for the remaining distance to achieve an average speed of 8 km/hour for the whole journey.
Consider the following statements :
1.     The best means of measuring time is by the movement of the earth, the moon and the planets.
...Which of the following will complete the adjoining figure
Lightning is seen before thunder because
Who among the following rulers advised his subjects through this inscription ?
"Whosoever praises his religious sect or blames other sects out of...
The Blind river dolphins are found in the water of:
Consider the following statements :
1.     Fa Xian took the land route back to China through the north-west and Central Asia and carried b...
' Kammakaras ' in ancient period, were -
A city likely to record the lowest minimum annual temperature in July is
Inland water transport does not take place in the rivers of
How many times has the constitution been amended since its inception?
