Chrystal’s vehicle speed is 30 miles per hour. Ascending the mountain decreases its speed by fifty percent, and descending the mountain increases its speed by twenty percent. If the distance going to the top of the mountain is 60 miles and the distance going down to the foot of the mountain is 72 miles, how many hours will Crystal have to pass the whole mountain?
Суръати воситаи нақлиёти Кристал 30 мил дар соат аст. Суръати он дар болоравии кӯҳ 50 фоиз кам мешавад ва дар поёнравии кӯҳ 20 фоиз зиёд мешавад. Агар масофаи боло рафтан ба қуллаи кӯҳ 60 мил ва масофаи поён рафтан ба поёни кӯҳ 72 мил бошад, Кристал чанд соат бояд барои гузаштан аз тамоми кӯҳ сарф кунад?
How fast is the vehicle going when ascending the mountain? ** The vehicle's speed decreases to 30 x 0.50 = <<30*0.50=15>>15 miles per hour when ascending to the top of the mountain.
How many hours will it take to go to the top of the mountain? ** So, the total time Crystal will have to spend going to the top of the mountain is 60 / 15 = <<60/15=4>>4 hours.
How fast is the vehicle going when descending the mountain? ** And the speed of the vehicle increases by 30 x 0.20 = <<30*0.20=6>>6 miles per hour when going down to the foot of the mountain.
How fast is the vehicle going when descending the mountain? ** So, the total speed of the vehicle when going down is 30 + 6 = <<30+6=36>>36 miles per hour.
How many hours will it take to go down the mountain? ** Thus, Chrystal will have to spend 72 / 36 = <<72/36=2>>2 hours to descend from the mountain.
How many hours will it take to pass the whole mountain? ** Therefore, the total hours she will spend to pass the whole mountain is 4 + 2 = <<4+2=6>>6 hours.
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How fast is the vehicle going when ascending the mountain? ** Суръати восита ҳангоми болоравӣ ба кӯҳ 30 x 0.50 = <<30*0.50=15>>15 мил дар соат коҳиш меёбад.
How many hours will it take to go to the top of the mountain? ** Пас, вақти умумии Кристал барои расидан ба қуллаи кӯҳ 60 / 15 = <<60/15=4>>4 соат хоҳад буд.
How fast is the vehicle going when descending the mountain? ** Ва суръати восита ҳангоми поёнравӣ 30 x 0.20 = <<30*0.20=6>>6 мил дар соат зиёд мешавад.
How fast is the vehicle going when descending the mountain? ** Пас, суръати умумии восита ҳангоми поёнравӣ 30 + 6 = <<30+6=36>>36 мил дар соат мебошад.
How many hours will it take to go down the mountain? ** Аз ин рӯ, Кристал бояд 72 / 36 = <<72/36=2>>2 соат барои поёнравӣ аз кӯҳ сарф кунад.
How many hours will it take to pass the whole mountain? ** Бинобар ин, соатҳои умумие, ки ӯ барои гузаштан аз тамоми кӯҳ сарф мекунад, 4 + 2 = <<4+2=6>>6 соат мебошад.
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