Question

$\bf\red{Question}$
A car covers 120 km at a uniform speed of 60 km/h and the next 60
km at a uniform speed of 40 km/h. Find the total time taken.​

Answer 1

Answer:

Ans is 7hr 30 min

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Answer 2

EXPLANATION.

Car covers 120km at a uniform speed of 60 km/hr.

Next 60km at a uniform speed of 40km/hr.

As we know that,

Distance = Speed x Time.

Time = Distance/Speed.

⇒ Distance = 120km.

⇒ Speed = 60km/hr.

⇒ T₁ = 120/60.

⇒ T₁ = 2.

⇒ Distance = 60km.

⇒ Speed = 40 km/hr.

⇒ T₂ = 60/40 = 3/2.

⇒ Total time = T₁ + T₂.

⇒ Total time = 2 + 3/2.

⇒ Total time = (4 + 3)/2.

⇒ Total time = 7/2 hours.

⇒ Total time = (7/2) x 60 = 210 min.