Calculate distance using circumference — task. Mathematics State Board, Class 7.

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If the length of the second's hand of a clock is 21

$mm$ , then calculate the distance travelled by tip of the second's hand in

$1$ minute? (Use

$π$ = 22/7)

Distance travelled by the tip of the second's hand of a clock in

$1$ minute is

$mm$

Answer variants:

132

120

111

151

$1$

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