1)A, B and C are 8 bit nos. They are as follows:
A -> 1 1 0 0 0 1 0 1
B -> 0 0 1 1 0 0 1 1
C -> 0 0 1 1 1 0 1 0 ( - =minus, u=union)
Find ((A - C) u B) =?
2)My flight takes of at 2pm from a place at 18N 40E and landed 10 Hrs later at a place with coordinates 36N40W.
What is the local time when my plane landed?
Submitted by: AdministratorFirst of all 'u' indicates "OR "operation. and secondly "subtraction " => addition of two's complement.
taking into account these two steps.
C=00111010
1's complement=11000101
2's complement=1's complement+1
=11000110
thus A-C => A+(2's complement of C) i.e
11000101+11000110
= 10001011 (neglecting the carry)
now (a-c)u b => 10001011 u 00110011
= 10111011
= 187 (ans)
2.) In these questions the north-south longitudes are of no value. What matters is only the east-west latitudes.
here the person goes from 40E to 40W,i.e a total movement of 80 degrees.
so time shift= 24*(80/360) ( a total of 360 degrees).
= 5.33 hrs.
time when he started = 2pm
time taken = 10 hrs
so time of arrival = 12 am
However travelling from east to west=> 12-5.33
= 6.27 pm (ans)
Submitted by: Administrator
taking into account these two steps.
C=00111010
1's complement=11000101
2's complement=1's complement+1
=11000110
thus A-C => A+(2's complement of C) i.e
11000101+11000110
= 10001011 (neglecting the carry)
now (a-c)u b => 10001011 u 00110011
= 10111011
= 187 (ans)
2.) In these questions the north-south longitudes are of no value. What matters is only the east-west latitudes.
here the person goes from 40E to 40W,i.e a total movement of 80 degrees.
so time shift= 24*(80/360) ( a total of 360 degrees).
= 5.33 hrs.
time when he started = 2pm
time taken = 10 hrs
so time of arrival = 12 am
However travelling from east to west=> 12-5.33
= 6.27 pm (ans)
Submitted by: Administrator
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