Question
George’s plane climbs 450 feet in 40 seconds. Altitude scaled by the plane keeping same speed in 4 minutes is ________.
- 2000
- 2500
- 2700
- 3000
Hint:
The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
The correct answer is: 2700
Here, it is given that George's plane climbs 450 feet in 40 seconds. We have to find the height scaled by the plane in 4 minutes.
We have, Height scaled in 40 seconds = 450 ft.
Height scaled in 1 second = 450/40 ft.
Height scaled in 4 minutes = 450⁄40 × 240 = 2700 ft.
Hence, the correct option is C.
We can also find the height scaled in 4 minutes by multiplying the height scaled in 40 seconds by 6.
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