Advertisements
Advertisements
प्रश्न
A watch which gains uniformly is 2 minutes slow at noon on Monday and is 4 minutes 48 seconds fast at 2 p.m on the following Monday. When was it correct?
विकल्प
2 p.m. on Tuesday
2 pm on Wednesday
3 pm on Thursday
1 p.m. on Friday
उत्तर
2 pm on Wednesday
Explanation:
Time from 12 pm on Monday to 2 pm on the following Monday = 7 days 2 h
So, the watch gains`=2+4 48/60 "min".`
`=6 4/5 "min".`
`34/5` min in 170 h
Now, `34/5` min are gained in 170 h.
∴ 2 min is gained in `70xx5/34xx2`
= 50 h = 2 days 2 hours
So the watch is correct 2 days 2 h after 12 pm on Monday i.e. It will be correct at 2 pm on Wednesday.
APPEARS IN
संबंधित प्रश्न
A man walks from his house to the Railway station to catch a train, which is running as per schedule. If he walks at 6 km/hr, he misses the train by 9 minutes. However, if he walks at 7 km/hr, he reaches the station 6 minutes before the departure of rain. The distance of his home to the Railway Station is:
A boat takes 3 hours to travel from place M to N downstream and back from N to M upstream. If the speed of the boat in still water is 4 km/hr, what is the distance between the two places?
Solve the following question and mark the best possible option.
A person can swim in still water at 4 km/hr. If the speed of water is 2 km/hr, how many hours will the man take to swim back against the current for 6 km?
An express train travels at an average speed of 120 km per hour, stopping for 4 minutes after every 80 kms. How long will it take the train to reach a destination 960 km away?
120 men had food provision for 200 days. After 5 days, 30 men died of an epidemic. The food will last for further
A person covers a certain distance by car at a speed of 30 km/h and comes back at a speed of 40 km/h. The average speed during the travel is
Neeraj is going to Agra on his bike from Delhi. He overtakes a bus traveling from Delhi to Agra at 4.30 pm. Neeraj reaches Agra at 6 pm. After stopping there for an hour, he starts back towards Delhi and meets the same bus at 7.30 pm which was moving towards Agra at that time. If both the bus and the bike were traveling with uniform speeds on the same route, at what time would the bus reach Agra?
In covering a distance of 30 km, Abhay takes 2 h more than Sameer. If Abhay doubles his speed, then he would take 1 h less than Sameer. Abhay's speed is
Two cyclists start simultaneously from two points A and B, their destinations being B and A, respectively. After crossing each other, they precisely take 2 hours 33 minutes 36 seconds and I hour 26 minute 24 seconds respectively to reach their destinations. What is the ratio of the speed of the first to that of the second cyclist?
The length of a train and a platform is equal. The train at the speed of 90 km/hr crosses the platform in 1 minute. What is the length of platform?
