Question

a bus covers a certain distance in 50 minutes if it runs at 54 km per hour what must be the speed of the bus in order to reduce the time of journey to 40 minutes​

Answer 1

Answer:

Speed of the bus should be 67.5 km/hr to reduce the time of journey to 40 minutes

Step-by-step explanation:

Time=50 mins=50/60 hrs = 5/6 hr

Speed = 54 km/hr

Distance = Speed × Time

Distance = 54 × 5/6 km

Distance = 45km

Now Time has changed to 40 mins

Time = 40 mins = 40/60 hrs = 2/3 hrs

Distance = 45 km

Speed = Distance/Time

Speed = 45÷2/3 km/hr

Speed = 45×3/2 km/hr

Speed = 67.5 km/hr