A cow is standing 5 feet from the middle of the bridge .A
train is at a distance of 2 times length of the bridge from
direction in which cow is nearer to end of the bridge is
coming at a speed of 90 miles/hour.If cow moves towards
train it will be saved by 1 foot.If cow moves away from
train it will be hit by three inches of cow
(i)Find length of bridge
(ii)Find cows speed
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