A lorry starts from Banglore to Mysore at 6.00 A.M, 7.00 A.M, 8.00 am.....10 pm. Similarly one another starts from Mysore to Banglore at 6.00 am, 7.00 am, 8.00 am.....10.00pm. A lorry takes 9 hours to travel from Banglore to Mysore and vice versa.
(i) A lorry which has started at 6.00 am will cross how many lorries?
2006-10-22 19:26:25 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
It will arrive at its destination at 3 pm so it will cross paths with a lorries that leave before 3 pm ie the ones that leave the destination at 6am, 7am, 8am. 9 am 10 am 11, am 12 noon, 1pm and 2 pm ie 9 lorries and it will arrive just as the 10th one leaves.
2006-10-22 19:45:57 · answer #1 · answered by Wal C 6 · 1⤊ 0⤋
It will meet no lorries for the first 4.5 hours, then it will finally meet the 6am Mysore lorry. Then every 1/2 hour after that it will meet the subsequent lorries. The last lorry it will meet is the one leaving Mysore at 3pm.
So if you count meeting the lorry that is just leaving you actually have *ten* lorries, though intuitively you'd think it would be nine.
The correct answer is 10 lorries.
Btw, have they finally finished the paving/construction on the Bangalore to Mysore road? It was crazy and scary driving on that road when I travelled to see Mysore Palace! There were lorries passing buses which were all passing a car or a cart. There were vehicles on both sides of the road heading toward us... and how come the drivers like to leave their lights off but only use them to flash each other when it is dark?
2006-10-24 17:35:48 · answer #2 · answered by Puzzling 7 · 0⤊ 0⤋
It will cross the first lorry which started from the other side at 6:00 am at 10:30. the the one at 7 at 11:00. then at 11:30 the at then at 12:00 and then at 12:30 and then at 1:00 and then at 1:30 and then at 2:00 and then at 2:30 ad then at 3:00 as the other is just leaving so we have 10 lorries.
2006-10-23 08:22:50 · answer #3 · answered by Anonymous · 0⤊ 0⤋
9 lorries
2006-10-23 15:06:49 · answer #4 · answered by Vicki Z 2 · 0⤊ 0⤋
9 lorries is correct. All those that leave before the 6am lorries arrive 9 hrs later at 3pm.
2006-10-23 02:42:55 · answer #5 · answered by Jimbo 5 · 0⤊ 0⤋
3 lorries
2006-10-23 02:29:35 · answer #6 · answered by genius sonia 3 · 0⤊ 0⤋
it will cross 5 lorries
2006-10-23 03:10:53 · answer #7 · answered by raj 7 · 0⤊ 0⤋
i think they would cross 9 lorries
2006-10-23 02:51:50 · answer #8 · answered by malli 1 · 0⤊ 0⤋