Question

Mr Naresh starts journey in east direction from point A at 9 AM and ends journey at 7pm. He walks at a speed of 3 km/hour for 1 hour and walks backward at a speed 1 km/hour for 1 hour. Again he turns back and walks at a speed of 3 km/hour for 1 hour and walks backward at a speed 1 km/hour for 1 hour. He keeps on doing it till end of the journey. At what time he will be able to ring bell which is kept at a distance of 10 km from A in east direction?​

Answer 1

After  5.40 pm. he will be able to ring bell

Given:

Mr Naresh starts journey in east direction from point A at 9 AM and ends journey at 7pm.

He walks at a speed of 3 km/hour for 1 hour and walks backward at a speed 1 km/hour for 1 hour.

Again he turns back and walks at a speed of 3 km/hour for 1 hour and walks backward at a speed 1 km/hour for 1 hour.

He keeps on doing it till end of the journey.

To find:

At what time he will be able to ring bell which is kept at a distance of 10 km from A in east direction?​

Explanation:

Mr Naresh starts journey in east direction from point A at 9 AM

He walks at a speed of 3 km/hour

At 10 Am he reaches 3 km from home.

After that he turns back and walks 1 km/hour for 1 hour.

So at 11 Am he reaches 3-1 = 2 km from home.

So on the similar way at 1 pm he reaches 2+2 = 4 km from home.

So at 5 pm he reaches = 8 km from home.

After that he walked 3 km/hour east direction from point A

So clearing 2 km distance time required = $\frac{2}{3}$ hour =  $\frac{2}{3}$ × 60 = 40 min.

So after  5.40 pm.  he will be able to ring bell.

To learn more...

1)1/24+1/28+1/36=?

this is a time and work problem

https://brainly.in/question/6864885

2)Lesson name is problems on time and work

1)'A'can do a work in 10 days and 'B' can do the same work in 16 days . with the help of C ,they do the work in 4 days only.in how many days 'C' can do the work alone?

answer = 11 × 3/7 days

https://brainly.in/question/3032942