exam Maths Puzzle

Starting from my office, I reach the house 20 min late if I walk at 3kmph. Instead, if I walk at 4kmph, I reach the house 15 min early. How far is my house from my office?

A.

4 km

B.

5 km

C.

7 km

D.

6 km

Read Solution (Total 1)

let distance be x km.
then,
x/3-x/4=35/60(since at first he is 20 min late and then 15 min early,so 20+15=35/60 hr)
therefore,x=7 km(ans)
11 years agoHelpfull: Yes(0) No(0)

exam Other Question

Karan and Arjun run a 100-meter race, where Karan beats Arjun 10 metres. To do a favour to Arjun, Karan starts 10 metres behind the starting line in a second 100 metre race. They both run at their earlier speeds. Which of the following is true in connection with the second race?

A.

Karan and Arjun reach the finishing line simultaneously

B.

Arjun beats Karan by 1 metre

C.

Arjun beats Karan by 11 metres

D.

Karan beats Arjun by 1 metre
Two boats, traveling at 5 and 10 kms per hour, head directly towards each other. They begin at a distance of 20 kms from each other. How far apart are they (in kms) one minute before they collide?

A.

1
12

B.

1
6

C.

1
4

D.

1
3