Предмет: Математика, автор: noporanasta

Ковзаняр за 1 с пробігає 10 м. За який час він пробіжить по периметру майдан- чика прямокутної форми зі сторонами 60 м і 90 м?​

Ответы

Автор ответа: dobra888
1

Відповідь:    30 с .

Покрокове пояснення:

    1)  2* ( 60 + 90 ) = 2 * 150 = 300 ( м ) - периметр майданчика

   2)  300 : 10 = 30 ( с ) - час , за який пробіжить ковзаняр по

         периметру майданчика .

Автор ответа: gog41586
1

Ответ:

30с

Пошаговое объяснение:

1) 60*2 + 90*2 = 120 + 180 = 300 (м) - треба пробігти ковзаняреві

2) 300 : 10 = 30 (с)

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