Tanu is walking at a speed of 10 km/h. After every kilometre she takes a rest for 10 minutes. The time taken to cover a distance of 5 km by Tanu is:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 1 h 10 minutes
The total time is the walking time plus the rests. She rests after each kilometre except the last, because once the 5th kilometre is done the walk is over.
At 10 km/h, 1 km takes 6 minutes, so 5 km take \(5\times6=30\) minutes
Rests after the 1st, 2nd, 3rd and 4th km: \(4\times10=40\) minutes
Total \(=30+40=70\) minutes \(=1\) h 10 minutes