Solving 8 problems per minute, Fast Finn can finish his test in time. He was however, working faster, solving 10 problems per minutes. That is why he finished 6 minutes early. How many problems were on the test. Solving 8 problems per minute, Fast Finn can finish his test in time. He was however, working faster, solving 10 problems per minutes. That is why he finished 6 minutes early. How many problems were on the test?

Number of problems = 240

Step-by-step explanation:

Let x be the number of questions and t be the time.

Given:

Average rate = 8 problems per minute

Fast Finn rate = 10 problems per minute

Fast Finn taken time = t - 6

We need to find the number of problems on the test paper.

Solution:

Average rate to solve test paper.

--------------(1)

Fast Finn rate to solve the test paper.

Using cross multiplication rule.

substitute  from equation 1.

Rearrange the equation as:

Using cross multiplication rule.

x = 240 problems.

Therefore, 240 problems were on the test.

2nd one in the first row is correct