Question

Sachin can cover a distance in 1hr 24 min by covering 2/3 of the distance at 4 km/hr and the rest at 5 km/hr. The total distance is_.
(a)5 km/hr
(b)6 km/hr
(c)7 km/hr
(d)8 km/hr​

Answer 1

Step-by-step explanation:

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Answer 2

Answer

Step-by-step explanation

6 km

Let total distance=D

Distance travelled at 4 km ph speed :

=(2/3) D

Since he travelled rest at 5 km ph

So, Distance travelled at 5 km ph speed

=(1-2/3)D=1/3 D

Total time =1 hr 24 min = (60+24) min

=84/60=21/25

So, Total time :21/15=2/3 /4 D+1/3 /5 D

21/15=2D/12+D/15

84=14D

D=6km