Book Maths Puzzle

Two boys starts from the same place walking at the rate of 5 kmph and 5.5 kmph respectively in the same direction. What time will they take to be 8.5 km apart?

Read Solution (Total 1)

5.5kmph-5kmph=0.5kmph
same direction means we should subtract 2 speeds.The final speed is the relative speed.
distance=8.5km
then t=8.5/0.5 therefore time=17hrs
11 years agoHelpfull: Yes(0) No(0)

Book Other Question

In covering a distance of 30 km, Arun takes 2 hours more than Anil. If Arun doubles his speed, then he would take 1 hour less than Anil. What is Arun's speed? A and B walk around a circular track. A and B walk at a speed of 2 rounds per hour and 3 rounds per hour respectively. If they start at 8 a.m. from the same point in opposite directions, how many times shall they cross each other before 9.30 a.m.?