Question

find area of shaded region ​

Answer 1

Answer:

Method #1

Given

1 hour = 60 minutes

Thus, 2 hours x 60 minutes/hour = 120 minutes

Therefore

120 minutes ÷ 30 minutes = 0.25 = 25%

Method #2

Dividing in half is something that most people can easily do in their head. This method is useful for estimating.

Since

2 hours x 60 min/hour = 120 minutes = 100%

Therefore

120 minutes ÷ 2 = 60 minutes = 50%

60 minutes ÷ 2 = 30 minutes = 25%

Answer 2

Answer:

15 cm

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