Mathematics
Grade10
Easy
Question
A car skidded m ft during a race. The expression s =
is the r rate of speed of the car in ft/s. Find the rate of the speed of the car, if the car skidded 169 ft
Hint:
Speed = Distance/ time.
The correct answer is: ![26 square root of 2](data:image/png;base64,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)
We have to find the speed of a car which skidded 169m during a race given that speed is a function of distance skidded, s = √8m.
We have, s = √8m
=> s = √8×169
=> s = 2×13√2
=> s = 26√2.
Hence, the correct option is C.
A radical expression is an expression containing a square root.