25.
A person has to cover a distance of
q 6 km in 45 min. If he covers one half
of the distance in two-third of the
total time then to cover the
remaining distance in the
remaining time, his speed must be-
(1) 6 km/hr (2) 8 km /hr
(3) 12 km /hr (4) 15 km/hr
Answers
Answered by
2
Answer:
(3) 12 km / hr
Step-by-step explanation:
sol1
The person needs to cover
6
km in
45
minutes
Given that he covers one-half of the distance in two-thirds of the total time
⇒
he covers half of
6
km in two-thirds of
45
minutes
⇒
He covers
3
km in
30
minutes
Now he needs to cover the remaining
3
km in remaining
15
minutes
Distance
=
3
km
Time
=
15
minutes
=
1
4
hour
Required Speed
=
3
(
1
4
)
=
12
km/hr
sol2
He needs to cover remaining half distance in remaining one-third of the total time.
i.e.,
3
km in
15
minutes.
i.e.,
12
km in
1
hour.
Therefore, required speed
=
12
km/hr
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