Bluebook SAT Test SAT Word Problems Practice 5

Question 1

A $1,200 investment earns 5% simple interest per year. How many years will it take for the investment to reach $1,500?

Accepted Answer

5

Answer

Interest needed = $300. Using I = Prt: 300 = 1200 × 0.05 × t → t = 5 years.

Question 2

An airplane flies 1,800 miles with a tailwind in 3 hours and returns into a headwind in 4.5 hours. What is the speed of the wind in mph?

Accepted Answer

100

Answer

Tailwind speed = 600 mph; headwind speed = 400 mph. Wind = (600 − 400)/2 = 100 mph.

Question 3

A 30-foot ladder leans against a wall with its base 18 feet from the wall. How high up the wall does it reach?

Accepted Answer

24

Answer

h² + 18² = 30² → h² = 576 → h = 24 feet.

Question 4

A company's revenue grew from $4 million to $5.2 million. What was the percent increase?

Accepted Answer

30%

Answer

Percent increase = (5.2 − 4)/4 × 100 = 1.2/4 × 100 = 30%.

Question 5

A box contains red, blue, and green marbles in the ratio 2:3:5. If there are 20 green marbles, how many total marbles are in the box?

Accepted Answer

40

Answer

Green = 5 parts = 20 marbles → 1 part = 4. Total = 10 parts × 4 = 40 marbles.

Bluebook SAT Practice Test