We use the formula,
[tex]a = \frac{v- u}{\Delta t}[/tex]
Here, a is acceleration, u is the initial velocity, v is final velocity.
Let t hour be the time for both car and bicycle increasing its speed.
The acceleration of the car,
[tex]a = \frac{60-50}{t} = \frac{10}{t} \ km/h^2[/tex]
The acceleration of bicycle,
[tex]a = \frac{10-0}{t} = \frac{10}{t} \ km/h^2[/tex]
Thus, the accelerations for both car and bicycle for their increasing speed in same time will be same.