Question

A person covers a distance in 40 mins if he runs at a speed of 45 kmph on an average. Find the speed at which he must run to reduce the time of journey in 30 mins

Answer 1

Given, Time = 40/60 hr

                      = 2/3 hr

Given, Speed = 45 kmph

So, Distance = speed/Time

                       =  45 * 2/3

                       = 30 km


Given, Time of journey  = 30 mins
  
                                         = 30/60

                                          = 1/2 hr

So, Speed = Distance/Time

                   = 30 * 1/2

                   = 15kmph.



Hope this helps!

Answer 2

Answer:30

Step-by-step explanation: