Algebra Puzzle – Challenge 39

Love to challenge your brain? Want to check your logic and critical thinking? Let's take a look at another great math puzzle!

Algebra Puzzle – Challenge 39

Challenge:

Joe and Mark can finish a job together in 100 minutes. If Joe can do the job by himself in 5 hours, how many minutes does it take Mark to finish the job?

A- 120

B- 150

C- 180

D- 200

E- 220

The Absolute Best Book to Challenge Your Smart Student!

Original price was: $16.99.Current price is: $11.99.
Satisfied 123 Students

The correct answer is B.

5 hours = 300 minutes. Use the formula: \(\frac{1}{a} + \frac{1}{b} = \frac{1}{t}\)
Where, a is the rate for the first person and b is the rate of the second person. Joe can finish the job in 5 hours (300 minutes) and they both can finish the job in 100 minutes.
\(\frac{1}{300} + \frac{1}{b} = \frac{1}{100} → \frac{1}{b} = \frac{1}{100} – \frac{1}{300}→ b = 150\)
150 minutes takes Mark to finish the job

The Absolute Best Book to Challenge Your Smart Student!

The Absolute Best Books to Ace Algebra

Original price was: $29.99.Current price is: $19.99.
Original price was: $29.99.Current price is: $14.99.
Original price was: $29.99.Current price is: $14.99.
Satisfied 1 Students
Original price was: $24.99.Current price is: $14.99.
Satisfied 92 Students
Original price was: $24.99.Current price is: $15.99.
Satisfied 125 Students

Related to This Article

What people say about "Algebra Puzzle – Challenge 39 - Effortless Math: We Help Students Learn to LOVE Mathematics"?

No one replied yet.

Leave a Reply

X
45% OFF

Limited time only!

Save Over 45%

Take It Now!

SAVE $40

It was $89.99 now it is $49.99

The Ultimate Algebra Bundle: From Pre-Algebra to Algebra II