Walking as 3/4 of his usual speed, a Shivam is 80 minutes late. His usual time to cover the same distance in hours, is
1). 41/2
2). 5
3). 51/2
4). 4
⇒ Let the usual time Shivam take be x min.
⇒ Time taken at 3/4 of his usual speed = x/(3/4)
⇒ Time taken at 3/4 of usual speed = (4x/3)
⇒ 4x/3 - x = 80
⇒ x/3 = 80
∴ x = 240 mins = 4 hours
⇒ Shivam usual time to cover the distance is 4 hours