Instructions

For the following questions answer them individually

Question 61

The side of a square is 5 cm. If the side is doubled, by how many times will the area of the square increase?

Question 62

A bus goes to Mumbai from Delhi at the speed of 60 km/h for 60% of the journey, and covers the remaining part of its journey at the speed of 70 km/h. What is the average speed of the bus (in km/h) during the entire journey under consideration?

Question 63

The following table shows the production of five types of cars by a company for the years 2012 to 2015 .

Which type of car constituted 30% of all cars produced by the company during 2013 ?

Question 64

A manufacturer sells an item to a wholesale dealer at a profit of 11%. The wholesaler sells the same to a retailer at a profit of 15%. The retailer in turn sells it to a customer for â‚¹17,045, thereby earning a profit of 19%. The cost price of the manufacturer is

(consider integral part only):

Question 65

In an examination, the average marks of 60 girls is 15 and the average marks of 40 boys is 30. The average marks of the group in which the boys and girls are taken together is:

Question 66

If $$1 + x^{2} + x^{2} = 585$$ and $$1- x + x^{2} = 65$$, then find the value of $$1 + x + x^{2}$$.

Question 67

A grocer has a sale of â‚¹8,435, â‚¹8,927, â‚¹8,855, â‚¹9,230 and â‚¹8,562 in 5 consecutive weeks. How much sale must he have in the 6th week so that he gets an average sale of â‚¹8,500?

Question 68

Ram is travelling at a speed of 72 km per hour while Shyam is travelling at a speed of 90 km per hour. What is the difference in their speeds (in metres per second)?

Question 69

A tractor is sold after allowing three successive discounts of 10%, 5% and 2%. If the marked price of the tractor is Rs 4,88,000, find its net selling price.

Question 70

If a = 2022, b = 2021 and c = 2020, then value of $$a^{2} + b^{2} + c^{2} - ab - bc - ca$$ is:

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