Sal knows the volume of a cylinder is 500 cubic units. he wants to create a cylinder with twice the volume. which variation of the original cylinder will have a volume of exactly 1,000 cubic units?
-use the same radius but double the height.
-use the same height but double the radius.
-double the radius and double the height.
-use the same height but quadruple the radius.

The answer is the first one i.e  use the same radius but double the height

Step-by-step explanation:

Given the volume of cylinder=500 cubic units

In order to make the volume 1000 cubic units

we have to double it

Now volume of a cylinder =

If we double the height the volume will be double of the original

In rest all the options the volume will get increased by a factor other than 2

Hence double the height and use the same radius

solution:

as, mean is defined as sum of all the observations divided by total number of observations.

and , median is mid value of the data whether arranged in ascending order or descending order.

consider, roadsters:

2,3,4,5,6,7,8,9

mean =

also, median= , because number of observations is even, so median is mean of two mid values.

now, coming to bandits

2,3,4,5,6

mean =  

median = 4, as number of observations is odd.

so, roadsters has greater median as well mean than bandits.

→option a is true about the repairs performed on 2 types of cars:

bandits have lower median and mean than roadsters.