Question

How much angle is formed by the
big needle of the clock in 15
minutes ?
(a) 30°
(b) 90°
(c) 45°
(d) 120°​

Answer 1

In 60 minutes, the needle covers 360° by completing the circle.

Hence, in 1 minute the needle will cover 360/60 = 6 degrees.

Therefore, in 15 minutes, the needle will cover 6 × 15 = 90°

Hence 90° is the answer.

Answer 2

Answer:

(b) 90° is the required solution.

Step-by-step explanation:

We can start,

The needle covers 360° by completing the circle within 60 minutes.

Then the covered area of the needle in 1 minute will be,

→ 360/60

→ 6°

Then the covered area of the needle in 15 minutes will be,

→ 6 × 15

→ 90°

Thus, 90° is the correct answer.