Read the passage carefully and answer the following questions. A dancer is demonstrating dance steps along a straight line. The position-time graph of the dancer is given here.

The average speed for the dance step depicted by CD is

Options

A. ` 1 m s^(-1)`
B. `1.33 ms^(-1)`
C. `2.75 m s^(-1)`
D. `0.89 m s^(-1)`

Answer

C

Explanation

Distance covered for dance step CD= 4 m
Time taken for CD is greater than 1 s but less than 2 s .
Since , average speed = `("total distance")/("total time")`
Therefore average speed is less than `4 m s^(-1)` but greater than 2 `m s^(-1)` . Hence , option (C) is the only possibility.