What is the total surface area of a cylinder having radius of base as 7 cm and height as 5 cm?

In the given question, two equations numbered l and II are given. Solve both the equations and mark the appropriate answer.

I. x²+ 19x + 78 = 0

II. 45y²+ 83y + 28 = 0

If the numerical value of thes perimeter of an equilateral triangle is  $$ \sqrt {3}$$ times the area of it, then the length of each side of the triangle is

In a triangle, if three altitudes are equal, then the triangle is 

The pie graph given here shows the break-up of the cost of construction of a house.

Assuming that the total cost of construction is ₹ 6,00,000, answer the questions.

Break-up of the cost of construction of a house 

The amount spent on cement is

Answer the following questions

There are three numbers in such a way that the average of the first and second numbers is 68 more than the average of the second and third number. Find the difference between first and the third number.

If the duty on an article is reduced by 40% of its present rate by how much per cent must its consumption increase in order that the revenue remains unaltered?

If a person travels a certain distance at a speed of 10 km/h, and returns through the same route at a speed of 20 km/h, then what will be the average speed during the whole journey?