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TSD Relative Speed - 2
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Relative speed part - 2

## Bharat Gupta is teaching live on Unacademy Plus

Bharat Gupta
Engineer by degree Mathematician by Heart. Having 22 years of teaching experience. Visit my youtube channel BHARAT GUPTA-RADIX .

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concepts are purely explained, tysm sir
Dn
sir in the bus and person question how Did we said 30 sec is the time to meet as per the formula the question says after 30 sec the bus is behind the person that implies 30 sec is the time to cover total of 200 m how come 30 sec is time to meet plz explain
Sir I m confused in the bus question ..as how you took 120m +80 m as the distance travelled . Don’t you think we have to calculate that distance on the basis of speed 56km/hr for 30 sec which is equal to 56*30*5/18 and then we will add 40 to the results kindly correct me once
how theif 20m away distance?
Rs
Rahul sharma
5 months ago
1:30 and 2 pm me 1/2 hr difference,,, speed is 40 kmph ,,,1/2 hr = 20 kmph
Sir you are ultimate great lecturer
1. TIME, SPEED AND DISTANCE Relative speed - 2

2. 1 w ai

3. A thief steals a car at 1.30 pm and drives it off at 40 km/hr. The theft is discovered at 2 pm and the owner sets off in another car at 50 km/hr. He will overtake the thief at: a. 5 pm b. 4 pm c. 4.30 pmd. 6 pm

4. A thief steals a car at 1.30 pm and drives it off at 40 km/hr. The theft is discovered at 2 pm and the owner sets off in another car at 50 km/hr. He will overtake the thief at: a. 5 pm b. 4 pm c. 4.30 pm d. 6 pm Tiwe to ov

5. A boy started from his house by bicycle at 10 am at a speed of 12 km per hour. His elder brother started after 1 hr 15 mins by scooter along the same path and caught him at 1.30 pm. The speed of the scooter will be (in km/hr): a. 4.5 b. 36 2 d.9 c. 18 3

6. A boy started from his house by bicycle at 10 am at a speed of 12 km per hour. His elder brother started after 1 hr 15 mins by scooter along the same path and caught him at 1.30 pm. The speed of the scooter will be (in km/hr): a. 4.5 b. 36 2 d.9 c. 18 3 R. S. 21-12=- C1 2

7. A person is driving with the velocity of 56 km/hr. He saw a bus 120 m away. After 30 sec bus is 80m behind him. Find speed of bus in km/hr. a. 40 km/hr b. 28 km/hr c. 32 km/hr d. 30 km/hr s Deo

8. Arjun's house is at the top of a hill. He is moving up the hill towards his house at a constant speed of 90 kmph. His pet dog, Tommy, spots the car from the top of the hill when it is 1140 km away from the top. The dog starts moving down the hill comes to the car and again goes back to the top of the hill. This movement of dog continue till Arjun reaches his house. The speed of the dog is 120 km/h in both down hill and uphill movement. Find the total distance covered by the dog. a. 2760 km b. 1520 km c. 2660 km d. None of these

9. Arjun's house is at the top of a hill. He is moving up the hill towards his house at a constant speed of 90 kmph. His pet dog, Tommy, spots the car from the top of the hill when it is 1140 km away from the top. The dog starts moving down the hill comes to the car and again goes back to the top of the hill. This movement of dog continue till Arjun reaches his house. The speed of the dog is 120 km/h in both down hill and uphill movement. Find the total distance covered by the dog. a. 2760 km b. 1520 km c. 2660 km d. None of these To I uo uw 3

10. A man is travelling by 20km/hr and the second by 18 km/hr in the same direction together. The second man increases his speed by half km/hr in each hour. After how many hours, the second man meet the first man? a. 8 b. 10 C. 9 d. 12