Advertisements
Advertisements
प्रश्न
In a 100 meters race, A beats B by 20 meters B beats C by 5 meters. In the same race, A beats C by:
विकल्प
26 meters
25 meters
24 meters
22 meters
उत्तर
24 meters
Explanation:
Let A complete the race in t sec.
A's running speed`=100/"t"` m/sec
B's running speed`((100-200))/"t"=80/"t"` m/sec
Time taking by B to complete 100 m race
`=100/(80//"t")=5/4"t"`
C's running speed`=((100-5))/(5//4"t")=76/"t"`
Now, A beat C by a distance
`(100/"t"-76/"t")xx"t"` = 24 m
APPEARS IN
संबंधित प्रश्न
In a garden, there are B rows and 10 columns of papaya trees. The distance between the two trees is 2 metres and a distance of one metre is left from all sides of the boundary of the garden. The length of the garden is
Azhar can row 9.333 kmph in still waters and finds that it takes him thrice as much time to row up than as to row down the same distance in the river. The speed of the current of the river is
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
The length of the bridge, which a train 130 m long on travelling at 45 km/h can cross in 30 s, is
A train moving with uniform speed crosses a pole in 2 s and a 250 m long bridge in 7 s. Find the length of the train.
Two trains of equal length are running on parallel lines in the same direction at 46 km/h and 36 km/h. The faster train passes the slower train in 36 s. The length of each train is
Mr. X drives to his office at an average speed of 48 km per hour. The time taken to cover the first 60% of the distance is 10 minutes more than the time taken to cover the remaining distance. How far is his office?
A man covers half of his journey as 6 km/h and the remaining half at 3 km/h. His average speed is
A train travels 500 m in first minute. ln the next 4 minutes, it travels in each minute 125 m more than that in the previous minute. The average speed per hour of the train during those 5 minutes will be
