The wheel of an engine of 300 cm in circumference makes 10 revolution in 6 secon

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Question
The wheel of an engine of 300 cm in circumference makes 10 revolution in 6 seconds. what is the speed of the wheel (in km/h)?
Options
A. 18
B. 20
C. 27
D. 36

Correct Answer

18

Explanation

Circumferences means one resolutions .
Therefore, distance covered in 10 resolutions =300 x 10 = 30 m
i.e., 30 meters in 6 seconds.
? Speed of wheel = 30/6 m/s = 5 m/s
? 5 m/s = 5 x (18/5) = 18 km/h

Time and Distance problems

Search Results

1.
A train passes an electric pole in 10 seconds and a platform 120 m long in 18 seconds. Its length in meters is?
Options
A. 150 m
B. 130 m
C. 240 m
D. 180 m

2.
The length of Lucknow mail is 120m and that of punjab mail is 80 m. These two trains are running in the same direction with velocities of 40 km/h and 50 km/h respectively. The time taken by them to cross each other is?
Options
A. 8 sec.
B. 72 sec.
C. 11.5 sec.
D. 12.5 sec.

3.
A train 350 m long is moving at the speed of 20 km/h. It will cross a man coming from the opposite direction at the speed of 1 km/h in?
Options
A. 27 sec
B. 35 sec
C. 45 sec
D. 60 sec

4.
A dog starts chasing to a cat 2 hours later. It takes 2 hours to dog to catch the cat. If the speed of the dog is 30 Km/h. What is the speed of the cat?
Options
A. 10 km/h
B. 15 km/h
C. 20 km/h
D. can't be determined

5.
A car travels a distance of 840 km at uniform speed. If the speed of the car is 10 km/hr more. It takes two hours less to cover the same distance. The original speed of the car was?
Options
A. 45 km/hr.
B. 50 km/hr.
C. 60 km/hr .
D. 75 km/hr.

6.
Anjali fires two bullets from the same place at the interval of 6 minutes but Bhagwat sitting in a car approaching the place of firing hears the second fire 5 min 32 sec after the first firing. What is the speed of car, if the speed of sound is 332 m/s?
Options
A. 56 m/s
B. 102 m/s
C. 28 m/s
D. 32 m/s

7.
A car crosses a man walking at 6 km/h. The man can see the things up to 450m only in one direction due to fog. He sees the car which was going in the same direction for 4.5 minutes. What is the speed of the car?
Options
A. 9 km/h
B. 12 km/h
C. 12.5 km/h
D. 15 km/h

8.
X and Y start walking towards each other at 8:00 am at the speeds of 3 km/h and 4 km/h, respectively. They were initially 17.5 km apart. At what time do they meet?
Options
A. 10 : 30 am
B. 10 : 30 pm
C. 11 : 30 am
D. 11 : 30 pm

9.
A train leaves manipur at 6:00 am and reaches Dispur at 10:00 am. Another train leaves Dispur at 8:00 am and reaches Manipur at 11:00 am. At what time do the two trains cross each
other?
Options
A. 7 : 56 am
B. 7 : 56 pm
C. 8 : 56 am
D. 8 : 56

10.
Anurag traveled a distance of 45 km in 8 h 45 min. He traveled partly on foot at 3 km/h and partly by bicycle at 8 km/h .The distance traveled on the bicycle, is?
Options
A. 25 km
B. 15 km
C. 30 km
D. 20 km

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