Question

nce between the two cities.
A car travels first 30 km with a uniform speed of 60 km/hr and then the next 30 km with a
uniform speed of 40 km/hr. Calculate (a) The total time of journey (b) The Average speed
of car.
hotfromtation and then havireretur framstations​

Answer 1

Answer:

Time taken during the first 30 km= Distance/Speed=30km/60kmhr= 1 /2hr

Time taken during the next 30 km= Distance/Speed=30km/40kmhr= 3/4hr

(a)Total time taken to complete the journey= (1/2+3/4)h r=(2+3)/4hr =5/4hr

                                                                  =(5/4 * 60)min= 75 min= 1hr and 15 min

(b) Average speed= Total distance covered/ Total Time taken

                        =  60/(5/4) km/hr

                        = 48 km/hr

Answer 2

Answer:

a) 50 minutes

b) 50 km/hr

Step-by-step explanation:

a) 60 / 30 =2 so it reaches 30 km in 1/2 hour

40/30 =1.33 so it reaches 30 km in 1/1.33 hour

b) 60

 +40

  100

100/2 = 50

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