05. Suatu zat cair diukur sekaligus menggunakan 3 termometer (Celcius, Reamur, Fahrenheit). Jika jumlah ketiga suhu 140, maka termometer Reamur akan terbaca ….

jika diketahui tr
tc = (5/4) tr
tf = (9/4) tr + 32°

jumlah ketiganya
tc + tr + tf = 140°
(5/4) tr + tr + (9/4) tr + 32° = 140°
(18/4) tr = 108°
tr = 108° × 4/18
tr = 24° ← jwb


cek
tr = 24°
tc = (5/4) • 24° = 30°
tf = (9/4) • 24° + 32° = 86°
————————————— +
tc + tr + tf = 140°