self Maths Puzzle

A WALKS A CIRCULAR FIELD AT A RATE OF 1 ROUND/HOUR WHILE B RUN S AROUND IT AT A RATE OF 6 ROUND/HOUR.THEY START IN THE SAME DIRECTION FROM THE SAME POINT AT 7.30 A.M.THEY SHALL FIRST CROSS EACH OTHER AT:
A.7.42AM
B.7.48A.M
C.8.10A.M
D.8.30A.M

Read Solution (Total 1)

A and B move in the same direction along the circle, so they will first meet each other when there is a difference of one round between the two
Relative speed of A and B

6-1 = 5 rounds per hour.
Time taken to complete one round at this speed = 1/5 hr = 12 min.

so they first cross each other at 7:30+ 12 min = 7:42 AM
12 years agoHelpfull: Yes(10) No(0)

self Other Question

Divide 28 into 4 parts in arithmetic progression, such that the ratio of product of first and third with the product of second and fourth is 8:15 The ratio of the ages of a man and his wife is 4:3. After 4 years,the ratio will be 9:7.If at the time of marriage the ratio was 5:3,then how many years ago were they married ?

a) 8 b) 10 c) 12 d) 15