Question

Q3) A person has to cover a distance of 6km in 45 minutes. If he covers one-half of the distance in two-thirds of the total time; to cover the remaining time, his speed (in km/hr) must be:

A) 6
B) 8
C) 12
D) 15

Explain how you got the answer

Answer 1

The correct answer - c. 12.

Step-by-step explanation:

Given:

Total distance: 6 km

Total time - 45 minutes

covered distance - one half of 6 km = 3 km

time used - 2/3*45 = 30 minutes

Solution:

Remaining distance - 6-3 = 3 km

Remaining time = 45 - 30 = 15 minutes or 1/4 hour

Required speed = remaining distance/ remaining time

=
`(3)/(1/4)`

=
`(3*4)/(1)`

= 12 km/hr