Question

6. A car travels first 30 km with a uniform speed of
60 kmh- and then next 30 km with a uniform speed
of 40 kmh Calculate : () the total time of journey
(ii) the average speed of the car.
18 km
Find :
and cu
hr​

Answer 1

$\huge{\boxed{\mathcal\pink{\fcolorbox{red}{purple}{SoLUTioN :-}}}}$

Distance covered by the car (S) = 30km +30km

(S) = 60km

intial velocity of the car (u) = 60km/h

final velocity of the car (v) = 40km/h

(ii). The average speed

= total velocity/Total distance covered

= (u + v) / s

= 60+40/ 60

= 100/60

= 5/3 kmh^-1

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