Bluebook SAT Test Ratios, Rates, Proportional Relationships, and Units 10

Question 1

Two pipes together fill a tank in 6 hours. Pipe A alone fills it in 10 hours. How many hours does Pipe B alone take to fill the tank?

Accepted Answer

15 hours

Answer

12 hours

Answer

16 hours

Answer

20 hours

Question 2

A car uses 6 liters of fuel per 100 km. If fuel costs $1.80 per liter, how much does it cost to drive 350 km?

Accepted Answer

$37.80

Answer

$32.40

Answer

$42.00

Answer

$45.50

Question 3

In a poll, 3 out of every 8 people prefer brand X. If 2,400 people were polled, how many preferred brand X?

Accepted Answer

900

Answer

750

Answer

800

Answer

1,000

Question 4

A 250 g packet of rice costs $1.50 and a 750 g packet costs $4.20. How many cents per 100 g cheaper is the larger packet?

Accepted Answer

4 cents

Answer

2 cents

Answer

6 cents

Answer

8 cents

Question 5

A worker is paid $22 per hour. After taxes of 25%, what is the worker's take-home pay for a 35-hour week?

Accepted Answer

$577.50

Answer

$530.00

Answer

$630.00

Answer

$770.00

Question 6

In a class, the ratio of students who passed to those who failed is 7:2. If 18 students failed, how many students are in the class?

Accepted Answer

81

Answer

63

Answer

72

Answer

90

Question 7

Sound travels at 343 m/s. How many kilometers does sound travel in 12 minutes? (1 km = 1,000 m)

Accepted Answer

246.96 km

Answer

123.48 km

Answer

206.80 km

Answer

412.60 km