Question

hey Users

A car covers 4 Successive 3 Km stretches at speeds of 10 Kmph, 20 Kmph, 30 Kmph and 60 Kmph respectively

its average speed is ___________

P.S : I am aware of the eqn to calculate this
but, I need a shortcut method for this
please provide me if you know

#No lazy answers
#No spams

Answer 1

To calculate average Speed, Add up the speeds and Divide by 4.
Like, Here,
10+20+30+40 = 100

$100 \div 4 \\ = 25$
Therefore, Average speed is approximately equal to 25 Km/hr.