Question
If I can walk a certain distance in 25 days when I rest
8 hours a day, how long will it take me to walk twice as far as if I walk twice as fast and rest twice as long each day?Solution
Walking hours per day = 24 – 8 = 16 hours Total walking hours = 25 ×16 = 400 hours Distance is doubled and speed too. (Both cancel each other) New walking hours (per day) = 24 – 16 = 8 hours ∴ Required Time = 400/8 = 50 daysÂ
Sumit covered a distance of 1000 km in 5 hours on a bike. How much distance will he cover on a bicycle in 7 hours if he rides the bicycle at 2/5th<...
A person crosses a 2400 m long street in 12 min. What is his speed (in km/h)?
- Two buses, ‘D’ and ‘E’, started from cities ‘A’ and ‘B’ towards each other at the same time. When they met after 10 hours, bus ‘E’ had ...
- A delivery boy travels a certain distance from his warehouse to the customer’s house. At a speed of 15 km/h, he arrives 18 minutes late. But when riding ...
- Due to walking at (3/4) of his normal speed, a boy reaches school 18 minutes late. What is the time he normally takes to go to school?
A man first travels 140 km at 70 km/hr and next 140 km at 35 km/hr. The average speed for the first 280 km of his travelling is:
‘A’ and ‘B’ started moving towards each other at same time with a speed of 23 km/hr and 10 km/hr, respectively. If the di...
- Bus 'X' and Bus 'Y' start together from a station heading in the same direction. Bus 'X' moves at 18 km/h while Bus 'Y' moves at 30 km/h. Determine the dis...
A car is traveling at a speed of 144 km/hr. The car's tires have a diameter of 70 m. How long will it take for the car to complete 12 revolutions of its...
Buses A and B are moving around a circular ground of radius 210 m. If the speeds of the buses A and B are 10 m/sec and 15 m/sec respectively, then what ...
Relevant for Exams:
