Acar of length 4.3m is travelling at 105kn/h it passes over a bridge of length 36m calculate the time in seconds it takes to pass over the bridge completely

Car takes 1.53 seconds to pass over the bridge completely

Solution:

Given that car of length 4.3m is travelling at 105km/h it passes over a bridge of length 36m

To find: time in seconds car takes to pass over the bridge completely

From given information,

Speed of car = 105 km/hr

Let us convert the kilometer per hour to meter per second

To convert km/hr into m/sec, multiply the number by 5 and then divide it by 18

So speed of car = 29.167 m/sec

Length of car = 4.3 m

Length of bridge = 36 m

For the car to completely pass the bridge, back end of car should cross the endpoint of bridge

So the distance covered by car to pass over the bridge completely = 4.3 + 36 + 4.3 = 44.6 m

Time taken is given as:

So car takes 1.53 seconds to pass over the bridge completely