Question

A car is moving at the rate of 60 km per hour covers the distance in 15 minutes how long would it take to cover the same distance if the speed is reduced to
i.36 km per hour
ii. by 36 km
answer fast..

Answer 1

Speed  V = 60 kmph
Time = t = 15 min = 15/60 =1/4 hr

Distance covered = D =  V * t = 15 km

1) New speed = 36 kmph
   New duration to cover D :  15/36 hrs = 5/12 hr = 25 minutes

2) New speed = 60 - 36 = 24 kmph
     New duration = 15/24 = 5/8 hr = 5*60/8 min = 37.5 min 

Answer 2

Hey!

Given,
Speed(v) = 60 kmph
Time (t) = 15 min or 1/4 hr

We know,
Distance(d) = speed(v) x time(t) 
                   = 60 x 1/4
                   =  15 km

(i)Given, speed 36 kmph
   Then, Time = distance/speed
                      = 15/36 hr or 5 minutes

(ii)Here speed will be!
    = 60 - 36 = 24 kmph
    Then time = distance/speed
                     = 15/24
                     = 5/8 hr or 37.5 min 

Hope It Helps You!