47.If Ram travels at a speed of 60 km/hr, from his home to class room, he reaches the class 10 mins late. If he travels at a speed of 80 km/hr, from his home to class room, he reaches the class 10 mins early. What is the distance between his home and classroom?
(b) 80 kms
Ans 47: (b) Sol: 80 kms