Question

A bridge is 2340 mtr long. Parth required 36 minutes to cross it. what was his speed in kilometer per hour.

Answer 1

Distance travelled = 2340 m = 2.34 km

Time taken = 36 min = 36 min × 1 hour / (60 min) = 0.6 hour

Speed = Distance / Time
= (2.34 km) / (0.6 hour)
= 3.9 kmph

His speed is 3.9 kilometer per hour

Answer 2

Distance travelled = 2340 m = 2.34 km
Time taken = 36 min = 36 min × 1 hour ÷ (60 min) 
                                  = 0.6 hours
Speed = Distance ÷ Time= (2.34 km) ÷ (0.6 hour)= 3.9 kmph
So , the ans is 3.9 kmph