Question

A car travels at a speed of 80km/he during the first half of it's running time and 40km/hr during the other half . Find the average speed of the car?

Answer 1

as the time is same for both situations so we can use
Vaverage = (V1 + V2)/2
= 80+40/2 = 120/2 = 60 km/h.

Answer 2

Answer:

$\green {Aɳsաҽɾ}$

➤Let us assume that,

➤The car travelled for 2 hour

➢So for one hour,

⇒Distance Travelled = Velocity × Time

⇒80 × 1

⇒80 km

➣For second one hour,

⇨Distance Travelled = Velocity × Time

⇨40 × 1

⇨40 km

⇨Total Distance Travelled = 80 + 40

⇨120 km

$\sf ➯Average \: speed = \dfrac{Total \: Distance}{Total \: Time}$

$\sf ➯\cancel \dfrac{120}{2}$

➾60 km/h.