Question

a bike travels 30km at a uniform speed of 50km\h and the next 30km at a uniform speed of 40km\h.find the average speed.​

Answer 1

Answer:

44.4 km/hr

Explanation:

D1         = 30

T1         = ?

SPEED = 50 KM/HR

D2         = 30

T2          = ?

SPEED   = 40 KM/HR

TOLD TO FIND AVERAGE SPEED

AVERAGE SPEED = TOTAL DISTANCE / TOTAL TIME TAKEN

TO FIND AVERAGE SPEED WE SHOULD FIRST FIND THE TIME

SO,

T1 = DISTANCE / SPEED

    = 30 KM /50 KM PER HR

    = 3/5 HOUR

T2 = DISTANCE/SPEED

     = 30 KM / 40 KM PER HR

     = 3/4 HOUR

AS WE GOT TO KNOW THE TIME WE CAN FIND THE AVERAGE SPEED

AVERAGE SPEED = TOTAL DISTANCE / TOTAL TIME TAKEN

TOTAL DISTANCE = D1 + D2

                                =30 +30 = 60 KM

TOTAL TIME            = T1 +T2

                                =   3/5 +3/4 = 12 + 15/20 = 27/20 HOUR

AVERAGE SPEED = 60 KM DIVIDE BY 27/ 20 HOUR

                              =  60 * 27 /20 = 44.4 KM / HR

SO THE  ANSWER IS 44.4 KM /HR.

Answer 2

Answer:

44

Explanation:

no.

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