**(1)** A car travels a distance of 480 km at a uniform speed. If the speed of the car were increased by 20 km/hr, it would take 2 hours less for the journey. What is the original speed of the car?

- (a) 60 km/hr
- (b) 40 km/hr
- (c) 80 km/hr
- (d) 70 km/hr

**(2)** If a sum of money becomes 4 times in 6 years at a certain rate of simple interest, what is the rate of interest per annum?

- (a) 12%
- (b) 16%
- (c) 10%
- (d) 8%

**(3)** A train travels a distance of 600 km at a uniform speed. If the speed of the train were increased by 10 km/hr, it would take 2 hours less for the journey. What is the original speed of the train?

- (a) 40 km/hr
- (b) 50 km/hr
- (c) 60 km/hr
- (d) 70 km/hr

**(4)** A worker can complete a job in 10 days. If he works with another worker, they can complete the same job in 6 days. How long would it take the second worker to complete the job alone?

- (a) 12 days
- (b) 15 days
- (c) 20 days
- (d) 25 days

**(5)** A rectangular garden is 24 meters long and 18 meters wide. If a person walks around the garden at a uniform speed of 4 meters per second, how long will it take to complete one round of the garden?

- (a) 12 seconds
- (b) 30 seconds
- (c) 36 seconds
- (d) 48 seconds