6. Convert: 25 °C to °F and 86 °F to °C
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Answer:
(i) 25° C = 77° F
(ii) 86° F = 30° C
Explanation:
° F = 9/5 × °C + 32
(i) °C = 25
° F = 9/5 × 25 + 32 = 45 + 32 = 77° F
(ii) ° F = 86
86° = 9/5 × °C + 32
(86 - 32) × 5/9 = ° C
54 × 5/9 = ° C
6 × 5 = 30°
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