Answer:
The velocity of the toboggan is 7.51 m/s.
Explanation:
Given that,
Mass of toboggan = 10 kg
Mass of girl =40 kg
Mass of boy = 45 kg
Velocity = 2 m/s
Suppose that h = 3.2 m
We need to calculate the velocity
Using conservation of energy


Put the value into the formula




The velocity of boy is


We need to calculate the velocity of the toboggan
Using principle of momentum

Put the value into the formula





Hence, The velocity of the toboggan is 7.51 m/s.