Question

A clock is started at noon. By 20 minutes past 8, the hour hand has turned through?
a)250 degrees
b)350 degrees
c)50 degrees
d)150 degrees

Answer 1

Answer:

250

Step-by-step explanation:

Angle traced by the hour hand in 1 hour = 360/12 = 30 degrees.

Angle traced by the hour hand in 8 hours = 30*8 = 240 degrees.

Angle traced by the hour hand in 20 minutes = 20*0.5 = 10 degrees.

Angle traced by the hour hand at 8.20 = 240 + 10 = 250 degrees

Answer 2

The hour hand has turned through 250 degrees.

Option - A

Step-by-step explanation:

Given:

A clock is started at noon. By 20 minutes past 8, the hour hand has turned through?  

Solution:

At noon the time is 12.

Angle traced by the hour hand in 1 hour =  $\frac{360}{12}$= 30 deg

Angle traced by the hour hand in 8 hour = 30 $\times$8 = 240 deg

Angle traced by the hour hand in 20 minutes = 20 $\times$ 10 deg

Total angle = 240 + 10 = 250 degrees.

To know more:

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