For the following questions answer them individually
A candidate who gets 50 percent marks fails by 100 marks but another candidate who got 78 percent marks gets 30 percent more than the passing marks. The maximum marks is:
Susan can do the binding work of 100 books in 20 hours. Susan and Pragati together can do binding work of 600 books in 80 hours. In how much time Pragati alone can do the binding of 60 books?
A, B, and C can complete a work in 15, 30, and 20 days respectively. A left the work 1 day before the work was completed and B left 2 days before the completion of the work. Find the number of days required to complete the whole work.
If incomes of Reeta and Geeta are Rs.1,600 and Rs.2,400 respectively, then by what percentage is the income of Geeta more than the income of Reeta?
A man can row 9 km/h in still water. In a stream which is flowing at 4 km/h, it takes total 9 hours to row to a place and back to the starting point. How far is the place from starting point?
The population of a city increases at a rate of 2% for the first 2 years and then, decreases at a rate of 4% for the third year. What will be the population after 3 years if the present population of the city is 62,500?
3 solid cubes whose sides are 3 m, 4 m and 5 m, respectively, are melted to form a new cube. The total surface area of the new cube will be _______.
A shopkeeper purchased wheat at Rs.20 per kg and rice at Rs.80 per kg. He sold 80 kg of wheat at Rs.22 per kg and 20 kg of wheat at Rs.21 per kg. Furthermore, he sold 40 kg of rice at Rs.95 per kg and 60 kg of rice at Rs.93 per kg. Find his total profit in this deal.