Yadav has to travel 3 km by cycle, then 5 km by bus and then has to walk 1 km to reach school from his home. Rahul's home is at a walking distance of 2 km from his school. How much extra distance does Yadav travel to reach school?

Question

class6,math,olympiad,algebra,easy
( A ) 9
( B ) 7
( C ) 2
( D ) 5