pttt84
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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

Q3 A person has to cover a distance of 6km in 45 minutes If he covers onehalf of the distance in twothirds of the total time to cover the remaining time his spe class=

Respuesta :

Histrionicus

Answer:

The correct answer - c. 12.

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

                            = [tex]\frac{3}{1/4}[/tex]

                            = [tex]\frac{3*4}{1}[/tex]

                            = 12 km/hr

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