Question

Mohan completes a journey of 320 km in 4 3 hours in a car. If he covers the first three fourth of thejourney at 60 km/hr find the speed of the car for the balance of the journey.​

Answer 1

Step-by-step explanation:

total distance= 270 km

total time= 3hr 45min or 255min

1/3 distance= 90km

speed while this(90km)= 60km/hr

let time taken while this= 'x' hr

according to formula

60=90/x

x= 1.5hr or 1hr 30min or 90min

rest journey= 270-90= 180km

rest time= 225-90= 135min 2.25hr

speed= 180/2.25= 80km/hr

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