A square is of side 1 km. A man travels first two sides with the 30 miles/hour and third side with 60 km/h. What is the speed at which the man has to travel the fourth side, if the overall average speed is 60 kmph?


Tech Mahindra Karthik on 29-Mar-2014 17:07

A square is of side 1 km. A man travels first two sides with the 30 miles/hour and third side with 60 km/h. What is the speed at which the man has to travel the fourth side, if the overall average speed is 60 kmph?

on 8-Apr-2014 18:48

ans : 120
on 16-Jul-2014 01:04

90
on 17-Jul-2014 21:41

84<div><br></div>
on 4-Aug-2014 18:18

84 kmph or 52.5 mph
on 12-Aug-2014 21:45

84
on 23-Aug-2014 20:24

60 km/hr
on 27-Aug-2014 20:58

pls explain?
on 28-Aug-2014 15:26

sam<br>please explain?<br>if you know.<br>
on 9-Sep-2014 10:10

<div><span style="font-family: Arial, Verdana; font-size: 13px; font-weight: bold;">pls gve answer</span></div>
on 9-Sep-2014 11:50

which one is the correct answer<br><br>
on 14-Sep-2014 11:15

<span style="font-weight: bold;">pls explain priishree</span><div><span style="font-weight: bold;"><br></span></div>
on 17-Sep-2015 07:34

<div>120 average speed= total distance/total time</div><div>speed of covering 1st two sides=30miles/h ; 1mile=1.60km so 30*1.60=48km/h</div><div>total distance= 4km(4 sides)</div><div>total time =z=1/48+1/48+1/60+1/x where x is speed of the 4th side</div><div>Now, 60=4/z </div><div>by solving it x comes out 120km/h </div>
on 1-Oct-2015 10:33

120
on 11-Oct-2015 21:26

84kmph or 52.5 mph
on 28-Oct-2015 12:46

120
on 19-Jan-2016 23:04

120
on 29-Jan-2016 16:10

120
on 1-Feb-2016 14:32

120
on 9-Feb-2016 14:19

84...
on 25-Feb-2016 00:16

120, (60*4)=240; but 30+30+60=120; so another 120 is needed to make 240. and for avg. 60 km speed
on 28-Feb-2016 21:35

120
on 1-Mar-2016 13:24

120 as the time taken will also var with the speed 30 miles/h =48 km time taken for 1st side=1/48 for second side 1/48 for 3rd side1/60 for fourth side 1/x and then we know 60=4/s where s is the average time s=1/48+1/48+1/60+1/x on solving x=120
on 12-Mar-2016 11:36

120
on 14-Mar-2016 21:03

120
on 16-Mar-2016 19:17

120, (60*4)=240; but 30+30+60=120; so another 120 is needed to make 240
on 29-Mar-2016 10:49

120
on 12-Apr-2016 10:03

120
on 12-Apr-2016 11:29

Approx 55.38kmph
on 18-Apr-2016 11:28

83.6 km/hr
on 5-Jun-2016 13:06

120
on 5-Jun-2016 13:06

120
on 8-Jun-2016 08:13

120
on 2-Jul-2016 11:46

120
on 20-Jul-2016 18:29

120
on 25-Jul-2016 18:39

120
on 26-Jul-2016 18:33

120
on 1-Aug-2016 15:23

120
on 23-Aug-2016 21:36

120
on 7-Sep-2016 12:14

83.4394 km/hr
on 7-Sep-2016 23:11

Basically 1mile=1.6093km In first two side it maintain 30 mile per hour which is 48.2803 kmph In 3rd side it take 60kmph If 48.2803+48.2803+60+X =240(Basically total derived from average of 60kmph) We get x=83.4394 THEREFORE THE FOURTH SIDE SPEED IS 83.4394KMPH
on 19-Oct-2016 16:29

84km/hr
on 5-Jan-2017 10:38

120
on 6-Feb-2017 20:14

65.86
on 22-Feb-2017 17:00

84
on 1-Mar-2017 14:59

120miles/hr let the sides be , a,b,c,d speed along a=30miles/hr along b=30miles/hr along c=60miles/hr along d=z miles/hr given: avg=60miles/hr=(30+30+60+z)/4 on solving; z=120 miles/hr
on 14-Mar-2017 11:33

120
on 24-Jul-2017 15:16

1 mile =1.60934km 30 miles/hour = 48.2802 km/h. given:average = 60km/h Let x be the fourth side. 60 = (x+48.2802 +48.2802+60)/4 x=83.4396 km/h is the speed at which the man has to travel the fourth side