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人気のある Word Problems >

Two jets leave an air base at the same time and travel in opposite directions. One jet travels 84 miles per hour faster than the other. If the two jets are13,410 miles apart after 9 hours, what is the rate of each jet?

解

Tw o j e t s l e a v e an ai r ba se a t t h e s am e t im e an d t r a v e l in o pp os i t e d i rec t i o n s . O n e j e t t r a v e l s 84 mi l es p er h o u r f a s t er t han t h e o t h er . I f t h e tw o j e t s a re 13, 410 mi l es a p a r t a f t er 9 h o u rs, w ha t i s t h e r a t e o f e a c h j e t ?

解

first je t^{'} s speed : 787

second je t^{'} s speed : 703

解答ステップ

Translate the problem into an equation:

x \cdot 9 + (x - 84) \cdot 9 = 13410

x

を解く

x \cdot 9 + (x - 84) \cdot 9 = 13410 : x = 787

発見する speed

first je t^{'} s speed : 787

second je t^{'} s speed : 703

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