A train went 400 miles from city A to B city at a speed of 80mph.At what speed should it travel on the way back if wants to have an average speed of 96mph for entire round trip journey??
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208 kms okk sashi i think it would help you
sashii:
wrong
which is not right
the ans is 120
how
hmm
Answered by
1
average speed = 2xy/(x+y)
where x is speed from A to B
and y is speed from B to A
so,
x = 80 mph
y = ??
average speed = 96mph
2×80y/(80+y) = 96
160y = 96(80+y)
5y = 3(80+y)
5y -3y = 240
2y = 240
y = 120 mph
hence ,
120mph speed it should travel on the way back
mark as brainlist if it helps u
okk
where
@sashii can do it
hii
hlo
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can uh send me solution of this question
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