Answers

(1)50wで100秒、20℃上昇
 →1wで0.4℃上昇するのに2秒かかる
 →30÷2=15 15×0.4=6 A.6℃
(2)50wで20℃上昇する
 →☆1wで0.4℃上昇
 →16×0.4=6.4 A.6.4℃
(3)☆→15÷0.4=37.5 A.37.5℃

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