Question

One day, Ravi left his home and cycled $10$ km southwards, turned right and cycled $5$ km. He then, turned right and cycled $10$ km and then, turned left and cycled $10$ km more. How many kilometres will he have to cycle to reach his home straight?

• A. $10$ km
• B. $15$ km
• C. $20$ km
• D. $25$ km

Answer 1

The correct option is B $15$ km

Here, Ravi starts from home at A, moves $10$ km southwards upto B, turns right and moves $5$ km upto C, turns right again and moves $10$ km up to D and finally turns left and moves $10$ km up to E.
Thus, his distance from initial position A = AE
=AD+DE
=BC+DE= ($5$+$10$) km= $15$ km.

option B