In covering a distance of 30 km, Ali takes 2 hours more than Raza. If Ali doubles his speed, then he would take 1 hour less than Raza. What is the speed of Ali?
- 10 kmph
- 6 kmph
- 5 kmph
- 7.5 kmph
Explanation
1. Let Ali's speed be x kmph. Then, the time taken by Ali to cover 30 km is 30/x hours.
2. Since Ali takes 2 hours more than Raza, the time taken by Raza to cover 30 km is (30/x) - 2 hours.
3. If Ali doubles his speed, his new speed is 2x kmph. The time taken by Ali to cover 30 km at this new speed is 30/(2x) hours.
4. According to the problem, if Ali doubles his speed, he would take 1 hour less than Raza. So, we can set up the equation:
(30/x) - 2 = (30/(2x)) - 1
Simplifying the equation, we get:
30/x - 2 = 15/x - 1
Multiplying both sides by x, we get:
30 - 2x = 15 - x
Simplifying further, we get:
x = 5
So, Ali's speed is 5 kmph.
Related MCQs
- 30 km
- 35 km
- 36.67 km
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 0.6
- 0.7
- 0.8
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 5:35 am
- 5:15 pm
- 5:35 pm
- None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
- 350 km
- 300 km
- 400 km
- 450 km
اس سوال کو وضاحت کے ساتھ پڑھیں
- 20 days
- 30 days
- 40 days
- 50 days
اس سوال کو وضاحت کے ساتھ پڑھیں
Leave a Reply
Your email address will not be published. Required fields are marked *
