A man can row 12 km/hr in still water. If the speed of the current is 3 km/hr, it takes 4 hours more in upstream than in the downstream for the same distance. The distance is
Let the required distance be x km. According to the question ⇒ x/(12 – 3) – x/(12 + 3) = 4 ⇒ x/9 – x/15 = 4 ⇒ (5x – 3x)/45 = 4 ⇒ x = 4 x 45/2 = 90 km
In a village 40% of votes were cast in an election. A and B were the contestants. A won by 600 votes. If B had got 60% more votes, there would have been...
A student multiplied a number by 4/5 instead of 5/4. What is the percentage error in the calculation?
There were two candidate in an election. 15% of the total voters did not cast their votes whereas 10% of the casting votes were declared invalid. If th...
In a recent survey in a city, 60% houses contained two or more persons and rest have only 1 person. Of those houses having only one person, 45% were ha...
In an election two candidates participates. 20% voters did not vote. 25% votes declared invalid and the winner get 80 % of the valid votes. If he win by...
There are 100 students in a particular class. 60% students play cricket, 25 % play football and 15% play both the games. What is the number of students ...
The value of A’s car is depreciating by 25% every year whereas the value of his house is appreciating by 15% each year as compared to the previous yea...
In an election two candidates participated. 10% voters did not vote. 11(1/9)% votes declared invalid and the winner got 75% of the valid votes. If he wo...
What was the percentage increase of land under cultivation in Punjab in the year 2013 as against 2011?
Monthly income of P is Rs.14000 and his monthly savings is Rs.8500. If his monthly income is decreased by 30% and monthly expenditure is decreased by 25...
