A man can row 24 km. upstream and 54 km downstream in 6 hours. He can also row 36 km upstream and 48 km downstream in 8 hours. What is the speed of the man in still water

The numerator of a fraction is decreased by 25% and the denominator is increased by 250%. If the resultant fraction is $6 \over 5$, what is the original fraction ?

In a village three people contested for the post of village Pradhan. Due to their own interest, all the voters voted and no one vote was invalid. The losing candidate got 30% votes. What could be the minimum absolute margin of votes by which the winning candidate led by the nearest rival, if each candidate got an integral per cent of votes?

The price of an article is first increased by 20% and later on the price was decreased by 25% due to reduction in sales. Find the net percentage change in final price of Article.