5* = 5+
bases are same.
>x=4
r = 4* = 4x4x4x4
= 256
Let the length of the bridge ber metres
Speed of train = 108 Km/hr.
Length of train = 110 m
Distance covered by train to cross bridge =
Distance travelled
108 km = 108000
Time taken
1 hr = 3600s
This is a case of direct variation
108000 110+ x
3600 13
30 x 13 = 110 + X
390 - 110 = x
280 = x
Ans Length of bridge is 280 metres
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