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Popular 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?

Solução

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 ?

Solução

first je t^{'} s speed : 787

second je t^{'} s speed : 703

Passos da solução

Translate the problem into an equation:

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

Resolver para

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

Encontrar speed

first je t^{'} s speed : 787

second je t^{'} s speed : 703

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