A lorry starts from banglore to mysore at 6.00
a.m,7.00am.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. (ii) a lorry which had started at 6.00pm will cross how many lorries.
Answers
Answered by
9
a) A lorry beginning at 6 am reaches its destination at :
6.00 + 9 hrs
= 1500hrs = 3 P. M
This time, the 10 pm lorry arrives at 7 a.m
Therefore the trains it crosses along the way are :
The 7 am train, the 8 a. m train, the 6 a. m train and the 10 p.m
Total is : 4 lorries.
b) the time differences are :
Between 6pm and 6am = 12 hrs
6pm - 7 am = 11 hrs
6pm to 8 am = 10 hrs
6pm to 10 pm = 4 hrs
Since 4hrs < 9 hrs this lorry crosses the 10 pm lorry.
Hence the answer is 1 lorry.
Similar questions