A car covers a distance of 750 km at a constant speed. Had the car increased the speed by 10 kmph, it would have taken 2.5 hours less to cover the same distance. Find the original speed of the car.
- A. 50 kmph ✓
- B. 40 kmph
- C. 75 kmph
- D. 60 kmph
Correct Answer: A. 50 kmph
Explanation
Let the original speed be v. We have \frac{750}{v} - \frac{750}{v+10} = 2.5. Testing the options, for v=50, \frac{750}{50} - \frac{750}{60} = 15 - 12.5 = 2.5. The original speed is 50 kmph.
Related questions on Arithmetic
- Calculate compound interest on a sum of ₹ 64000 compounded quarterly for 1 year at a rate of 10%?
- A car owner or a man buys petrol at ₹ 8, ₹ 9 and ₹ 11 per litres for three successive years. What approximately is the average cost per litr...
- In a library 5 per cent books are in English; 10 per cent of the remaining are in Hindi and 15 per cent of the remaining are in Sanskrit. Th...
- (30\% \text{ of } 6500) \div 26 \div 25 = ?
- CP of 30 kg of rice is same as the SP of “X” kg of wheat. If shopkeeper makes profit of 20%, find X?