78.
A man walks 1 km towards East and then he turns to South and walks 5 km. Again he turns to East and walks 2 km, after this he turns to North and walks 9 km. Now, how far is he from his starting point?
A:
7 km
B:
4 km
C:
3 km
D:
5 km
The answer is:
D
Explanation
Correct option is D)
According to given conditions,
In ΔAFE
$AC^2 = AB^2 +BC^2$
$AC^2 = 3^2 + 4^2 ⇒AC= \sqrt{25}$ = 5km
Hence, option 'D' is correct.
