The stopping distance d for a car after the brake are applied varies directly as the square of the speed r. If a car traveling 70 mph can stop in 270 ft , how many feet will it take the same car to stop when it is traveling 40 mph? It will take how many feet?

Question

anonymous · Answer

Someone told me 172.8 but that was not right I need a integer or fraction

amistre64 · Answer

lol .... thats cause i used 50 instead of 70 .... typoed myself

amistre64 · Answer

270(40^2)/(70^2) might be better

amistre64 · Answer

270(1600)       270(16)       4320
---------- =  ------- =  ------ ... maybe
   4900                49             49

anonymous · Answer

8
88 ----
       49

anonymous · Answer

thx again Amistre

amistre64 · Answer

youre welcome :)