Question

Neil travelled 36km at a speed of 8km/hr.Grant travelled 48km at a speed of 10km/hr.Whose journey was quickest

Answer 1

Neil

Explanation:

Quickest journey = Min time taken

Time=Distance/Speed

Neil Time= 36/8 hr

= 4.5 hr

Grant Time=48/10

=4.8 hr

Neil take 0.3 hr(18 min) less time than Grant so he(Neil) is quickest

Answer 2

The time taken by Neil and Grant are 4.5 hours and 4.8 hours respectively. So, Neil is quickest.

Explanation:

Given that,

Distance covered by Neil, d = 36 km

Speed of Neil, v = 8 km/h

Time taken by Neil is,

$t=\dfrac{d}{v}$

$t=\dfrac{36\ km}{8\ km/h}$

t = 4.5 hours

Distance covered by Grant, d' = 48 km

Speed of Neil, v' = 10 km/h

Time taken by Neil is,

$t'=\dfrac{d}{v}$

$t'=\dfrac{48\ km}{10\ km/h}$

t' = 4.8 hours

The time taken by Neil and Grant are 4.5 hours and 4.8 hours respectively. So, Neil is quickest.

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Speed, distance and time

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