Question

In Leh, the temperature falls by 2 degree Celsius every hour. In how many hours and at what time will the temperature of Leh reach(-8) degree Celsius, if its temperature at 4 pm. Is 10 degree Celsius?

Answer 1

Answer:

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$temperature\: at \:4pm = 10^{\circ} C\\ \\ \\</p><p>rate\: of\: decrease\: in\: temperature= 2^{\circ}C\: every \: hour.\\ \\ \\</p><p>1st hour= 10-2= 8\\ \\ \\</p><p>2nd hour= 8-2= 6\\ \\ \\</p><p>3rd hour= 6-2= 4\\ \\ \\</p><p>4th hour = 4-2= 2\\ \\ \\</p><p>5th hour= 2-2=0\\ \\ \\ </p><p>6th hour= 0-2= -2\\ \\ \\</p><p>7th hour= -2-2= -4\\ \\ \\</p><p>8th hour= -4-2= -6\\ \\ \\</p><p>9th hour= -6-2= -8 \\ \\ \\</p><p>It \: will \: reach -8^{\circ} C\: in \: 9 \:hours.\\ \\ \\</p><p>4 pm \: can\: also\: be\: written\: as\: 16:00.\\ \\ \\ </p><p>16+9= 25\\ \\ \\</p><p>1 \: day\: has \: 24 \: hours.\\ \\ \\</p><p>25-24= 1\\ \\ \\</p><p>Therefore\: -8^{\circ} C \: will \: be \: reached\: at \:1 am.$

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