Question

car travels first 30 km with a uniform speed of 60 kilometre per hour and then next 30 km with a uniform speed of 40 km per hour calculate the total time of journey and the average speed of the car​

Answer 1

Answer:

1.25 hours and 56 kmph

Explanation:

• Time = Distance / Speed

t₁ = 30 km / (60 kmph) = 0.5 hr

t₂ = 30 km / (40 kmph) = 0.75 hr

Total time = t₁ + t₂

= 0.5 hr + 0.75 hr

= 1.25 hours

Average speed = Total Distance / Total time

= (30 km + 40 km) / (1.25 hr)

= 56 kmph

Answer 2

$\large\blue{heya mate!!}$

Time = Distance / Speed

t₁ = 30 km / (60 kmph) = 0.5 hr

t₂ = 30 km / (40 kmph) = 0.75 hr

Total time = t₁ + t₂

= 0.5 hr + 0.75 hr

= 1.25 hours

Average speed = Total Distance / Total time

= (30 km + 40 km) / (1.25 hr)

= 56 kmph