400 derajat reamur = .... derajat farenhait

Dik : R = 400 °R
R : (F - 32) = 4 : 9
Dit : F = ?
Jwb : (F - 32)/R = 9/4
F - 32 = 9/4 × R
= 9/4 × 400
= 9 × 100
= 900
F = 900 + 32
= 932 °F

Source https://sebuahcatatan.live/as/catatanbrain/tugas/2132563