In a row of boys, Rahul’s position from the right end is 39th and Pankaj’s position from the left end is 53rd. After interchanging their position, Rahul’s position becomes 64th from the right end. How many boys are there in the row?
Six girls are sitting in a row facing north. Garima is between Reena and Amita, Amita is on the immediate left of Pooja and Arpita is to the left of Rekha. Who is at the extreme left end?
Two donkeys are standing 400 meters apart. First donkey can run at a speed of 3 m/sec and the second can run at 2 m/sec. If two donkeys run towards each other after how much time (in sec) will they bump into each other?