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TSD Practice problem part - 5
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Time speed and distance problem part - 5

## 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 .

U
Thank you mam :)
i think 1 question answer is 24 min
Pg
Both the questions are solved incorrectly
As
answer is 12/7 chill, silly mistake
Priyansh Jain
5 months ago
ANUBHAV S
4 months ago
Equating total time by Arindam we can get 12/7(total time = time from house to temple + time to meet unnati.
IN practise problem 5 first question sir how can you make so silly mistake in calculations even though the denominator are not same you directly added the equation.
in the question Arindam doesn't travel at 9kmph ...alone he travels at 9kmphwhile going and 5kmph while returning for the lunchbox ....I think the solving is wrong.....and in the first question how is lcm x 2x and 3x ....3x???
1. TIME, SPEED AND DISTANCE Practice Questio _ 5

2. Mahesh starts walking towards the temple from his house. After covering one-third of the total distance he doubles his original speed. When he has walked two-third of the total distance he increase his speed to three times his original speed and reached the temple. While coming back to his house he covers entire distance at his original speed. If Mahesh walks for 2 hours, then for how much time does he walks at thrice his original speed? a. 24 min b. 8 min c. 6 min d. 12 min Rohit moves with a constant speed of 4 steps/seconds and Mina moves with constant speed of 1 step/second on an escalator. When the escalator moves downward at a constant speed Rohit takes 120 steps while Mina takes 60 steps to reach the bottom from the top of the a. 180 escalator. How many steps would be visible in the escalator when it becomes stationary? b. 120 c. 150 d. 160 Arindam and Unnati are siblings. They go to their school on the same route every day. One day Arindam leaves home at 7:00 AM and rides with constant speed of 9 km/hr. After 5 minutes at school, he realises that he has forgotten his lunch box at home, He immediately ride back to his home at a constant speed of 5 km/hr. At 7:25 AM he meets Unnati, who had left home at 7:15 AM, and is riding at a constant speed of 6 km/hr. What is the distance between their home and school? a. 9 km b. 5 km c. 9/5 km d. 5/9 kmm

3. Mahesh starts walking towards the temple from his house. After covering one-third of the total distance he doubles his original speed. When he has walked two-third of the total distance he increase his speed to three times his original speed and reached the temple. While coming back to his house he covers entire distance at his original speed. If Mahesh walks for 2 hours, then for how much time does he walks at thrice his original speed? a. 24 min b. 8 min c. 6 min d. 12 min

4. Mahesh starts walking towards the temple from his house. After covering one- third of the total distance he doubles his original speed. When he has walked two- third of the total distance he increase his speed to three times his original speed and reached the temple. While coming back to his house he covers entire distance at his original speed. If Mahesh walks for 2 hours in all, then for how much time does he walks at thrice his original speed? a. 24 min b. 8 min c. 6 min d. 12 min hins to wel at dl 2 x had 25, 3 d sa

5. Rohit moves with a constant speed of 4 steps/seconds and Mina moves with constant speed of 1 step/second on an escalator. When the escalator moves downward at a constant speed, Rohit takes 120 steps while Mina takes 60 steps to reach the bottom from the top of the escalator. How many steps would be visible in the escalator when it becomes stationary? a. 180 b. 120 c. 150 d. 160

6. Rohit moves with a constant speed of 4 steps/seconds and Mina moves with constant speed of 1 step/second on an escalator. When the escalator moves downward at a constant speed, Rohit takes 120 steps while Mina takes 60 steps to reach the bottom from the top of the escalator. How many steps would be visible in the escalator when it becomes stationary? a. 180 b. 120 c. 150 d. 160 or Rohit gBe ive. 30 a> r toha No

7. Arindam and Unnati are siblings. They go to their school on the same route every day. One day Arindam leaves home at 7:00 AM and rides with constant speed of 9 km/hr. After 5 minutes at school, he realises that he has forgotten his lunch box at home, He immediately ride back to his home at a constant speed of 5 km/hr. At 7:25 AM he meets Unnati, who had left home at 7:15 AM, and is riding at a constant speed of 6 km/hr. What is the distance between their home and school? .9km b. 5 km c. 9/5 km d. 5/9 kmm

8. Arindam and Unnati are siblings. They go to their school on the same route every day. One day Arindam leaves home at 7:00 AM and rides with constant speed of 9 km/hr. After 5 minutes at school, he realises that he has forgotten his lunch box at home, He immediately ride back to his home at a constant speed of 5 km/hr. At 7:25 AM he meets Unnati, who had left home at 7:15 AM, and is riding at a constant speed of 6 km/hr. What is the distance between their home and school? a. 9 km b. 5 km c. 9/5 km d. 5/9 km Cria