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Given, a car covers 180 km in 5 hours
Then, the car covers 1 km in 5/180 hours
So, the car covers 54 km = (5/180) * 54 hours
= (5 * 54)/180
= (5 * 6)/20 {54 and 180 are divided by 9}
= 30/20
= 3/2
= 1.5 hours
So, the car covers 54 km in 1.5 hours