For the following questions answer them individually
The marked price of an article is ₹840. A shopkeeper gives a discount of 15% on the marked price and still makes a profit of 19%. What is the cost price of the article?
The average marks of 5 students is 85. If the marks of a new student are also considered, then the average marks becomes 84. What is the marks obtained by the new student?
A bought a bag and a bottle for a total on ₹900. He sold the bottle at a profit of 12% and the bag at a profit of 20%. If he earned a total profit of ₹160.80, then calculate the cost price of the bottle.
A can beat B in a 100-metre race by 10 metres. B can beat C in a 100-metre race by 10 metres. What is the ratio ($$t_{A}: t_{B}: t_{c}$$), which are the respective times taken by A, B and C to complete the race?
The following table shows the number of tables and the number of chairs made of 5 different metals sold by a furniture store over a given time period.
N = Average number of chairs sold per metal
The number of tables sold that were made of metal M3 is approximately what percentage more than N?
A goldsmith uses 110 $$cm^{3}$$ of gold to make a wire 1 mm in diameter. He will use this wire to make gold chains of equal lengths. If each chain requires 56 cm length of wire, then how many gold chains can he make' [Use $$\pi = \frac{22}{7}$$]
M is inversely proportional to N. If M is 20, then N is 70. If N = 50, then what is the value of M?
A project can be completed by 2 men and 5 women in 8 days while 4 men and 6 women can complete the same project in 5 days. How many men will be required to complete this project in 4 days?
A boat can travel 18 km in 3 hours while going upstream, and 40 km in 4 hours while going downstream. What is the speed of the boat in still water?