Chapter 2, Problem 2P

To determine

The time taken to travel the given distance by bird.

Answer to Problem 2P

Required time is $\frac{3}{5}$ hour or 36 min.

Explanation of Solution

Given:

Speed of the bird is 25 km/h and given distance is $s=15$ km.

Formula used:

Speed v, distance s and time t are related as,

  $s=vt$

Calculation:

Here $v=25\text{km/h}$

  $s=15$ km

Substituting the values,

  $\begin{array}{c}t=\frac{15}{25}\text{hr}\\ \text{=}\frac{3}{5}\text{hr}\\ \text{=}\frac{3}{5}\times 60\min \\ =36\min \end{array}$

Conclusion:

The bird takes

  $\frac{3}{5}$ hour or 36 min time to fly 15 km.