Question : Find the average speed of a boy if he walks $\frac{1}{6}$th distance with a speed of 5 km/hr and rides a bike to cover the remaining distance at a speed of 25 km/hr. The total distance is 60 km.

Option 1: 15 km/hr

Option 2: 20 km/hr

Option 3: 12 km/hr

Option 4: 13 km/hr

Question : While going to the office, Sneha travels at a speed of 10 km/hr and on her way back, she travels at a speed of 15 km/hr. What is her average speed for the whole journey?

Option 1: 14 km/hr

Option 2: 12 km/hr

Option 3: 11 km/hr

Option 4: 13 km/hr

Question : A man covers half part of a certain distance at 60 km/hr. He covers 40% of the remaining distance at the speed of 12 km/hr and covers the rest of the distance at the speed of 18 km/hr. What is his average speed for the entire journey?

Option 1: 24 km/hr

Option 2: $\frac{58}{3}$ km/hr

Option 3: 36 km/hr

Option 4: 40 km/hr

Question : A man covers half part of a certain distance at 15 km/hr. He covers 40 percent of the remaining distance at the speed of 12 km/hr and covers the rest of the distance at the speed of 21 km/hr. What is his average speed for the entire journey?

Option 1: $\frac{140}{9}$ km/hr

Option 2: $15$ km/hr

Option 3: $\frac{164}{9}$ km/hr

Option 4: $\frac{139}{9}$ km/hr

Question : Dinesh makes four trips of equal distances. His speed on the first trip was 140 km/hr and in each subsequent trip, his speed was half of the previous trip. What is the average speed of Dinesh in these four trips?

Option 1: $40$ km/hr

Option 2: $44$ km/hr

Option 3: $\frac{112}{3}$ km/hr

Option 4: $\frac{124}{3}$ km/hr