Question

Q No:2
Incorrect Answer
In a marathon, the help desks are set up after every 200 meters for the runners. If the speed of a runner is 12km/hr,
approximately how many helpdesks he would have passed in an hour and a half.
O 90
72
O 80
You Selected
0 None of these
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Answer 1

Step-by-step explanation:

runner is 12km/hr,

approximately how many helpdesks he would have passed in an hour and a half.

O 90

72

O 80

You Selected

0 None of these

?

Answer 2

Answer:

90 help desks

Step-by-step explanation:

First, compute for the distance the runner should have traveled within the time frame of 1.5 hours (or 3/2 hours):

Distance = Time x Speed = 3/2 hr x 12 km/hr = 18 km

Then, divide 18 km by the distance of each help desk which is every 200 meters (or 0.2 km or 1/5 km):

18 km / (1/5) km = 90 help desks