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Popolare 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?

Soluzione

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 ?

Soluzione

first je t^{'} s speed : 787

second je t^{'} s speed : 703

Fasi della soluzione

Translate the problem into an equation:

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

Risolvi per

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

Trova speed

first je t^{'} s speed : 787

second je t^{'} s speed : 703

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