Anita can cover a sure separation in 1 hr 24min by covering two-third of the
separation at 4km/hr and the rest at5 km/hr. Find the aggregate separation
Answers
Step-by-step explanation:
Correct option is
B...6 km
Let the total distance is x km.
Total time=1 hr 24 min= 21/15 min
Tarun covers 2/3 of the distance at 4 km/hr then time to cover this distance= 2/3s/4
Remaining distance=s− 2/3s= 1/3s
Tarun covers rest of the distance at 5 km/hr then time to cover rest distance= 1/3s/5
∴ 21/15= 2/12s + 1/15s
=> 21/15 = 14 /60s
s =14 x 15 / 21 x 60 = 6 km
Step-by-step explanation:
Let the total distance is x km.
Total time=1 hr 24 min=
15
21
min
Tarun covers
3
2
of the distance at 4 km/hr then time to cover this distance=
4
3s
2
Remaining distance=s−
3s
2
=
3s
1
Tarun covers rest of the distance at 5 km/hr then time to cover rest distance=
5
3s
1
∴
15
21
=
12s
2
+
15s
1
⇒
15
21
=
60s
14
⇒s=
21×60
14×15
=6km