2 кв.м - 500мл
50 кв.м-х
Х=50*500/2= 12 500 мл=12,5 л
30мин=0,5ч
S=vt
V=s/t
V1=30/0,5=60км/ч
V2=40/0,5=80км/ч
<span>1</span><span>) 32</span><span>- 12</span><span>20 (</span><span>грн) -</span><span>різниця</span><span>2</span><span>)</span><span>60:</span><span>20</span><span>=</span><span>3</span><span>(грн</span><span>) -</span><span>вартує одна</span><span>ручка.</span><span>3</span><span>) 32</span><span>*</span><span>3</span><span>= 96</span><span>(грн</span><span>) -</span><span>заплатили</span><span>за</span><span>прості</span><span>ручки.</span><span>4</span><span>) 12</span><span>*</span><span>3</span><span>= 26</span><span>(грн</span><span>) -</span><span>заплатили</span><span>за</span><span>гелівие</span><span>ручки</span>