The speed of the airplane in miles per hour is 0.10mile/hr
Calculation of speed
The distance covered by the plane is =18 ft
The time used na the plane to cover the distance= 2 secs
If 18 ft = 2 sec
xft = 1 sec
Make xft the subject formula,
xft = 18/2 = 9ft/sec
But 1 ft = 0.000189 mile
9ft = 0.000189 × 9
= 0.001701mile/sec
Note: 60secs = 1 hour
if 0.001701mile = 1 sec
X mile = 60secs
make X mile subject of formula,
X mile = 0.001701 × 60
X mile = 0.10206mile/hr
To the nearest hundredth is 0.10mile/hr
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