Mahesh goes 30 m North then turns right and walks 40 m then again turn...
The movements of Mahesh are as shown in figure (A to B, B to C, C to D, D to E).

∴ Mahesh distance from his original position A = AE = (AB – BE)
= (AB – CD)
= (30 – 20)m
= 10 m
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Mahesh goes 30 m North then turns right and walks 40 m then again turn...
Given Information:
Mahesh goes 30 m North, then turns right and walks 40 m, then again turns right and walks 20 m, then again turns right and walks 40 m.
To Find:
The distance of Mahesh from his starting position.
Solution:
To solve this problem, let's break down Mahesh's movements step by step.
Step 1: Mahesh goes 30 m North
This means Mahesh walks straight ahead for 30 m in the North direction.
Step 2: Mahesh turns right and walks 40 m
After going 30 m North, Mahesh turns right and walks 40 m. This means he is moving towards the East direction.
Step 3: Mahesh turns right and walks 20 m
After moving 40 m towards the East direction, Mahesh turns right again and walks 20 m. This means he is now moving towards the South direction.
Step 4: Mahesh turns right and walks 40 m
Finally, after moving 20 m towards the South direction, Mahesh turns right again and walks 40 m. This means he is now moving towards the West direction.
Now, let's visualize Mahesh's movements on a grid:
North
|
West-|-East
|
South
Step 5: Calculating the distance from the starting position
Since Mahesh went 30 m North and then 20 m South, these two movements cancel each other out, leaving him at the same latitude as his starting position.
Then, his movement to the East for 40 m and the movement to the West for 40 m also cancel each other out, leaving him at the same longitude as his starting position.
Therefore, Mahesh is back at his starting position after completing all the movements.
Conclusion:
Mahesh is at the same position where he started, which means he is 0 m away from his starting position. Therefore, the correct answer is option A) 0 m.