A train when moves at an average speed of 40km. Reaches its destination on time. When its average speed becomes 35kmph. Then it reaches its destination 15 minutes late find the length of journey
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Answer:
Explanation:
A.s =40km/hr time=t
.----------------------------------------------------------------------------------------------------------.
A.s =35km/hr time =t plus 15min =t plus 15[1/60] = t plus 1/4hr
distance=
d=st d=st
=40t =35[t+1/4]
=35t+35/4
here distances are equal so
40t = 35t+35/4
5t =35/4
t =7/4 hr
d = 40t
=40[7/4]
=70km
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