Question

A volleyball coach plans her daily practices to include 10 minutes of stretching, 2/3 of the entire practice scrimmaging, and the remaining practice time working on drills of specific skills. On Wednesday, the coach planned 100 minutes of stretching and scrimmaging. How long, in hours, is the entire practice?

Answer 1

Since it is 100 minutes of stretching and scrimmaging, we can subtract the 10 minutes we know is stretching. 90 minutes is equal to 2/3 of the practice then. Divide by 2 and multiply by 3 to get the entire time of the practice or 135 minutes. However, you asked for it in hours, so we can subtract 120 minutes because this is 2 hours. 15 minutes is 1/4 of an hour. So practice took 2&1/4 hours. Hope that helps.

Answer 2

Time for the entire practice is 2.25 or 2 1/4 hours

Explanation:

According to the question the volley ball coach daily plan practice includes stretching , scrimmaging and she use the remaining practice time working on drills of specific skills.

let the entire time required for practice = y minutes

Stretching consumes 10 minutes, mathematically

stretching = 10 minutes

scrimmaging = 2/3 × y

Drills of specific skills = y - (2/3 × y) - 10 = 1/3 y - 10 minutes

On Wednesday she had

stretching + scrimmaging = 100 minutes

we all know her stretching daily timing is 10 minutes and scrimmaging timing is 2/3 × y

Therefore,

10 + 2/3 y = 100

100 - 10 = 2/3 y

90 = 2/3 y

multiply both sides by 3

90 × 3 = 2/3 y × 3

270 = 2 y

y = 135 minutes

since the answer is suppose to be in hours

60 minutes = 1 hour

135 minutes = ?

135/60 = 2.25 hours or 2 1/4 hours