A jogger is running at a speed of 15 km/hr. In what time he will cross a track of length 400 meters?A)100sB)87sC)96sD)45s
Question
A jogger is running at a speed of 15 km/hr. In what time he will cross a track of length 400 meters?
A) 100s
B) 87s
C) 96s
D) 45s
Solution
To solve this problem, we first need to convert the speed from km/hr to m/s. We know that 1 km = 1000 m and 1 hr = 3600 s. So, 15 km/hr = 15 * (1000/3600) m/s = 4.17 m/s.
Next, we use the formula time = distance/speed to find out how long it takes for the jogger to cross the track. So, time = 400 m / 4.17 m/s = 95.92 s.
Therefore, the closest answer is C) 96s.
Similar Questions
A car starts at 45 km [W] of a railroad crossing andtravels to 15 km [E] of the railroad in 1.2 h. What isthe velocity of the car in metres per second?
A train moving with uniform speed passes a pole in 10 sec and a bridge of length 1500 m in 110 sec. Find the speed of the train in m/s16 m/s86 m/s15 m/s 42 m/s
A jogger runs 5.0 km in 33 min. What is the speed ofthe jogger? (1.2) T/I(a) 0.15 m/s(b) 2.5 m/s(c) 0.25 m/s(d) 2.8 m/s
A horse covers a distance of 1500 meters in 1 minute 20 seconds. At what speed the horse is running?A)67.5kmphB)40kmphC)45kmphD)65kmph
A train of length 500 meters is running at a speed of 36km/hr will cross a bridge of length 500 meters in how many seconds?
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.