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Anu normally takes 4 hours more than the time taken by Sachin to walk D km. If Anu doubles her speed, she can make it in 2 hours less than that of Sachin. How much time does Sachin require for walking D km?
  • a)
    10 hours
  • b)
    4 hours
  • c)
    8 hours
  • d)
    9 hours
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Anu normally takes 4 hours more than the time taken by Sachin to walk ...
Let Sachin takes x hours to walk D km.
Then, Anu takes (x + 4) hours to walk D km.
With double of the speed, Anu will take (x + 4)/2 hours.
x – (x + 4)/2 = 2
⇒ 2x – (x + 4) = 4
⇒ 2x – x – 4 = 4
x = 4 + 4 = 8 hours
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Most Upvoted Answer
Anu normally takes 4 hours more than the time taken by Sachin to walk ...
Let Sachin takes x hours to walk D km.
Then, Anu takes (x + 4) hours to walk D km.
With double of the speed, Anu will take (x + 4)/2 hours.
x – (x + 4)/2 = 2
⇒ 2x – (x + 4) = 4
⇒ 2x – x – 4 = 4
x = 4 + 4 = 8 hours
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Community Answer
Anu normally takes 4 hours more than the time taken by Sachin to walk ...
Let's assume that Sachin takes x hours to walk D km.

- Anu normally takes 4 hours more than Sachin to walk the same distance. So, Anu takes (x + 4) hours to walk D km.

- If Anu doubles her speed, she can complete the distance in 2 hours less than Sachin. So, Anu takes (x - 2) hours to walk D km.

To find the value of x, we can set up an equation using the given information:

(x + 4) = 2(x - 2)

Simplifying the equation:

x + 4 = 2x - 4

Bringing like terms together:

x - 2x = -4 - 4

-x = -8

Dividing both sides by -1:

x = 8

Therefore, Sachin requires 8 hours to walk D km.

Hence, the correct answer is option C) 8 hours.
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Anu normally takes 4 hours more than the time taken by Sachin to walk D km. If Anu doubles her speed, she can make it in 2 hours less than that of Sachin. How much time does Sachin require for walking D km?a)10 hoursb)4 hoursc)8 hoursd)9 hoursCorrect answer is option 'C'. Can you explain this answer?
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