Clocks and Calendars Practice Test 1 with solutions

Question : 2 of 40

Marks: +1, -0

The minute hand of a big wall clock is 35 cm long. Taking π =

{22}/7

, the length of the arc, its extremity moves in 18 seconds is:

Solution:

Angle covered in 1 minute = 6°
Angle covered in 60 minutes =

6/{60}

1/{10}

Angle covered in 18 seconds =

1/{10} × 18

= 1.8°
Length of the arc =

Q/{360} × 2πr

{1.8}/{360}×2 × {22}/7 × 35

{18}/{3600} × 2 × {22}/7 × 35

= 1.1 cm

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