Cost and Rate Problems

The video reviews practice problems from a Grade 6 math lesson. It covers topics such as calculating ratios for vinegar prices, determining the cost of pasta, analyzing reading rates, calculating typing speeds, comparing train speeds, and finding the surface area of a polyhedron. Each problem is broken down step-by-step to help students understand the concepts and calculations involved.

If the store sells 2 gallons of vinegar for $3, what is the cost per gallon?

• $3.00

• $2.00

• $1.50

• $4.00

How much would 30 gallons of vinegar cost if 2 gallons are priced at $3?

• $90

• $60

• $45

• $30

What is the cost per pound of pasta if 8 pounds cost $12?

• $2.00

• $1.50

• $1.25

• $1.00

How much will the caterer pay for 21 pounds of pasta?

• $21.00

• $28.50

• $31.50

• $35.00

If Lin reads 20 pages in 35 minutes, how many pages can she read in 60 minutes?

• 30 pages

• 40 pages

• 47 pages

• 34.2 pages

How long will it take Lin to read a 47-page book at her current reading speed?

• 90 minutes

• 82.25 minutes

• 70 minutes

• 60 minutes

How many minutes will Diego need to type 385 words if he types 140 words in 4 minutes?

• 10 minutes

• 11 minutes

• 8 minutes

• 12 minutes

How many words can Diego type in 15 minutes?

• 420 words

• 525 words

• 600 words

• 700 words

Which train is faster: one traveling 30 miles in 1/3 hour or one traveling 20 miles in 1/2 hour?

• Second train

• First train

• Both are equal

• Cannot be determined

What is the total surface area of the polyhedron formed from the given net?

• 200 square inches

• 224 square inches

• 250 square inches

• 300 square inches