A train crossestwo person cyclying in the same direction, in 12 second and 15 seconds respectively.if the speed of the two cyclyst are 10 kmph and 12 kmph, then find the length and speed of train.
Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
dumbcow help me............
speed = 20kmph andlength =100/3 meter but dont kno hw to solve
not sure on this one
does it take 15 sec to pass both
Not the answer you are looking for? Search for more explanations.
no 12 sec and 15 sec respectively
ok got it
d = r*t
r is speed of train
d is distance of train
t is time it take to pass each cyclist
also need to convert from km/hr to m/s
1km/hr = 10/36 m/s
d = (r-10)(10/36)*(12)
d = (r-12)(10/36)*(15)
to find r set 2 equations equal
(r-10)(10/36)*12 = (r-12)(10/36)*(15)
12r -120 = 15r - 180
-3r = -60
r = 20
substitute this back in to find d
d = (20-10)(10/36)*12
d = 1200/36
d = 100/3
Let the speed of the train be v
Thus, the relative speed of c1 = v-c1=v-10
the relative speed of c2 = v-c2=v-12
speed = length of the train/time to cross the cycle
Therefore L/12+10 = L/15+12
15L+120*15 = 12L + 12*180
3L = 12*180 - 120*15
L = 4*180 - 40*15
you forgot to convert to m/s for speed because time is in sec
Ya right, sorry!
I don't know why they haven't given the option to delete answers!