Question

Table shows earning of 25 shops per day,what is the probability that a shop earns 1)Rs 100 and more 2)at least Rs 60
3)at the most rs. 40
Daily earnings 20-40 40-60 60-80 80-100 100-120
Frequency 5 13 2 3 2

Answer 1

Let x = 100 m and h = 10 cm

Using equation of motion we can then calculate the time of the motion as, 

h = ut + 1/2 gt²

So we will then assume initial velocity to be zero and g = 10 m/s² 

We will get 

t = √2h/g

t = √2 x 10 cm/ 10 m/s²

 t = √2 x 0.1 m / 10m/s²

t = 0.14 s 

Now again we will use equation of motion as, 

x = vt or v = x/t

we get, 

v = 100 m/0.14 s
v = 707.11 m/s