haddii magaalada Jakarta sacadeedu tilmaameyso 1 duhurnimo isla markaana ay dhacdo dhigta 106 Bari imisa ayay tilmaameysaa magaalada qaahira oo dhacda dhigta 30 baro ?
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Si loo xaliyo dhibaatadan, waxaan u baahanahay inaan isticmaalno fikradda aagagga waqtiga iyo farqiga u dhexeeya labada magaalo.
Mid kasta oo 15 ah oo dhererkiisu wuxuu u dhigmaa hal saac oo kala duwanaansho waqti ah, iyadoo waqtiga bari ka xigta meeriska (0 darajo) ka hor wakhtiga galbeedka. Jakarta, oo ku taal ku dhawaad 106 darajo Bari, waxay 7 saacadood ka horeysaa Isku-dubarid Universal Time (UTC+7). Qaahira, dhanka kale, waxay ku taal ku dhawaad 30 darajo Bari, taasoo 2 saacadood ka horeysa UTC (UTC+2).
Si aan u ogaano waqtiga Qaahira oo ay saacadu tahay 1-da duhurnimo ee Jakarta, waxaan u baahannahay inaan xisaabino farqiga u dhexeeya labada magaalo, kaasoo ah:
106 darajo Bari – 30 darajo Bari = 76 darajo Bari
Maaddaama 15-kii darajo ee Longitude ay u dhiganto 1 saac oo kala duwanaansho waqti ah, waxaan u qaybin karnaa 76 15 si aan u helno:
76 / 15 = 5.0666…
Tani waxay ka dhigan tahay in Qaahira ay 5 saacadood iyo ku dhawaad 4 daqiiqo ka horreyso Jakarta. Sidaa darteed, haddii ay tahay 1 PM Jakarta, wakhtiga Qaahira waxa uu noqon lahaa:
1 PM – 5 saacadood iyo 4 daqiiqo = 7:56 subaxnimo
Markaa wakhtiga Qaahira waxa uu noqon doonaa ku dhawaad 7:56 subaxnimo marka ay tahay 1 duhurnimo ee Jakarta.