(6) A car travels a distance of 360 km at a uniform speed. If the speed of the car were increased by 15 km/hr, it would take 2 hours less for the journey. What is the original speed of the car?
- (a) 40 km/hr
- (b) 45 km/hr
- (c) 50 km/hr
- (d) 55 km/hr
(7) If a sum of money becomes 5 times in 10 years at a certain rate of simple interest, what is the rate of interest per annum?
- (a) 40%
- (b) 25%
- (c) 20%
- (d) 30%
(8) A train travels a distance of 450 km at a uniform speed. If the speed of the train were increased by 15 km/hr, it would take 3 hours less for the journey. What is the original speed of the train?
- (a) 40 km/hr
- (b) 45 km/hr
- (c) 50 km/hr
- (d) 55 km/hr
(9) A worker can complete a job in 12 days. If he works with another worker, they can complete the same job in 8 days. How long would it take the second worker to complete the job alone?
- (a) 16 days
- (b) 18 days
- (c) 20 days
- (d) 24 days
(10) A circular garden has a circumference of 88 meters. If a person walks around the garden at a uniform speed of 5 meters per second, how long will it take to complete one round of the garden?
- (a) 15 seconds
- (b) 20 seconds
- (c) 22 seconds
- (d) 25 seconds
