You have studied the story of peppered moths in England. Had the industries been removed, what impact could it have on the moth population ? Discuss.

Study the following table carefully and answer the questions after analysing the data. In the table the percentage of population below poverty line and ratio of males and females in five districts of a state have been shown. If the total population of district D_(3) is 40000, what is the population below poverty line in the district D_(3) ?

With a uniform speed, a car covers a distance in 8 hours. Had the speed been increased by 4 km/hr, the same distance could have been covered in 7 hours and 30 minutes. What is the distance covered?