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Phổ biến 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?

Lời Giải

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 ?

Lời Giải

first je t^{'} s speed : 787

second je t^{'} s speed : 703

Các bước giải pháp

Translate the problem into an equation:

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

Giải

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

Tìm speed

first je t^{'} s speed : 787

second je t^{'} s speed : 703

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