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# need help

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An Ostrich is being chased by a cheetah. the ostrich is running at 44 feet per second and the cheetah is running at 110 feet per second. if the two started at the same place and the ostrich got a 60 second head start, how many seconds will it be before the cheetah catches it

Jan 15, 2020

#1
+107405
+2

In 60 seconds, the ostrich will run  60*44   = 2640 ft

And let  S  be the number of seconds that it will take the cheetah to catch the ostrich

So....the distance that  the ostrich will cover before being caught  is  2640 + 44S

So....we need to solve this

110S  = 2640 + 44S        subtract  44S from both sides

66S  =  2640      divide both sides by 66

S = 40 seconds

Jan 15, 2020
#2
+20254
+3

The ostrich gets a 44f/s x 60s =  2640 ft head start

the cheetah is running   110 - 44   66 f/s faster

to cover the 2640 ft   the cheetah will need       2640 ft/66f/s = 40 seconds to catch the ostrich

Jan 15, 2020
#3
+11358
+2

That's how you write in physics.

Jan 15, 2020