Question

Krish used to take thirty minutes to walk to his office. Recently, he bought a new cycle. Now he takes only seven-tenths of the time he used to take to reach office. How many minutes does he save by cycling to the office?

Answer 1

Krish saves 9 minutes by cycling to his office.

Explanation:

Krish used to take 30 minutes to walk to his office. After he bought a new cycle, he takes only 7/10 of the time he used to take to reach the office. Let's call the new time he takes to reach the office "t" (in minutes).

We can set up a proportion to find the value of t:

30 / 1 = t / (7/10)

To solve for t, we can cross-multiply:

30 * 7/10 = t

21 = t

So, Krish now takes 21 minutes to reach his office by cycle.

To find how many minutes he saves by cycling, we can subtract the new time from the old time:

30 - 21 = 9

Krish saves 9 minutes by cycling to his office.