Question

6. A body moves 3 km due west and then 4 km due north. The displacement of the body is
a. 5 km towards south.
b. 5 km towards south-west.
c. 5 km towards north.
d. 5 km towards north-west
​

Answer 1

Explanation:

The period of the function

f(x) = [x] + [2x] + [3x] + [4x] +

..+ [nx] - (n(n+1)x)/2

nEN

is?

(Where [.] represents greatest

integer

function)

Answer 2

Answer:

He walks 4km towards east, then

3km towards north

We will use Pythagoras theorem too find the distance between two points

Hence, 5 km is distance between points.

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