In the figure below, a cone is shown, with dimensions given in centimeters. What is the total surface area of this cone, in square centimeters? (Note: The total surface area of a cone is given by the expression πr2 + πrs, where r is the radius and s is the slant height.)
(A)225π
(B) 450π
(C) 465π
(D) 675π
(E) 18,000π
Tips for ACT English test
Read the Whole Sentence.
Don't Be Afraid to Pick NO CHANGE.
Don't Rush.
Rely on Rules, Not Your Ear.
Be Sure You Know the Easy, Common Rules.
Eliminate Identical Answers.
Pick the Clearest Answer.
Answer the Question that You're Asked.
The measure of the sum of the interior angles of a regular n-sided polygon is (n - 2)180°. A regular octagon is shown below. What is the measure of the designated angle?
(A) 135° (B) 144° (C) 200° (D) 225° (E) 315°
Correct Answer: D
Which of the following lines has the same graph as the line 2x - y = 12?
（A）6x + 3y = 36 （B） 4x + 2y = 24 （C） 4x - 2y = 12 （D） 4x - 4y = 24 （E） -6x + 3y = -36
Correct Answer: E
More ACT Math Exam Questions
- 1
In the qualifying rounds for a race, Rusty and Dale drive their cars around a 6,000-foot oval track. Rusty and Dale each drive 8 laps in the qualifying rounds in lanes of identical length.
Dale drives 6 laps in 90 minutes. At what average rate, in feet per hour, does Dale drive these 6 laps?
- 2|5 - 8| - |9 - 3| = ?
- 3
In the (x,y) coordinate plane below, points P (6,2) and Q (1,4) are two vertices of ΔPQR. If
PQR is a right angle, then which of the following could be the coordinates of R?
- 4A basketball player has attempted 30 free throws and made 12 of them.
Starting now, if he makes every free throw attempted, what is the least number of additional free throws he must attempt to raise his free-throw percentage to at least 55%?
(Note: Free-throw percentage =
× 100.) - 5
Every week, Donald records the amount of mileage that has accumulated on his truck. On Monday, Donald recorded that he had driven 16,450 kilometers. After a week of deliveries, his new recording was 18,130 kilometers. He drove for thirty hours during that week. What was his average driving speed during that week to the nearest kilometer per hour?