A motor vehicle travelled the first one third of a distance at a speed of v1=10kmph,second one third at a speed of v2=20kmph and the last one third at a speed of v3=60kmph. determine the mean speed of the vehicle over the entire distancea)15kmphb)12kmphc)10kmphd)18kmph

A motor vehicle travelled the first one third of a distance at a speed

1.	A motor vehicle travelled the first one third of a distance at a speed of v1=10kmph,second one third at a speed of v2=20kmph and the last one third at a speed of v3=60kmph. determine the mean speed of the vehicle over the entire distancea)15kmphb)12kmphc)10kmphd)18kmph
Answer» V1 = 1/3 ×10 =10/3 v2= 1/3 ×20 = 20/3 v3=1/3×60 =60/3 mean= v1+v2+v3/3 10/3 +20/3 +60/3/3 90/3/3 30/3 10kmph mean speed=10kmph option C is ANSWER

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A motor vehicle travelled the first one third of a distance at a speed of v1=10kmph,second one third at a speed of v2=20kmph and the last one third at a speed of v3=60kmph. determine the mean speed of the vehicle over the entire distancea)15kmphb)12kmphc)10kmphd)18kmph

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