Amar can do a piece of work in 30 days and Raman can do the same work in 15 days. If both work together, then what percent of the total work will be completed in 4 days?

A 300-meter-long train moving with an average speed of 126 km/hr. crosses a platform in 24 seconds. A man crosses the same the same platforms in 5 minutes. What is the speed of man in meter/second?

In 64 liter of pure alcohol, 20 liter of water is mixed and then $$ {1\over 4}{th}$$ of the mixture is taken out. When x liter of water is added again then ratio of water to that of the alcohol becomes 1:2. Find value of x?

The average of six numbers is 3.52. The average of two of them is 3.7, while the average of other two is 2.5. What is the average of the remaining two?

When 1062, 1134 and 1182 are divided by the greatest number .x, the remainder in each case is y. What is the value of (x − y)?

If x = a - b, y = b - c, z = c - a, then the numerical value of the algebraic expression x³ +y³ + z³ -3xyz will be 

Directions: Read the given pie and table carefully and answer the following questions.

The pie chart shows the percentage distribution of people who found COVID – 19 positive in four major cities of India from 1^st July to 31^st August 2020 and the table shows the number of people who tested positive in July from these cities.

Number of people from Delhi who tested positive in July is what percent of total positive tested people of that city?

$$ {x^{8}+4\over{x^{4}+2x^{2}+2}}$$ is equal to