Question
A shopkeeper requires various numbers of pieces
of wire, each 22 cm long. However the wire is available in the market in multiples of 1 metre only. What minimum length should be purchased to avoid any wastage?Solution
LCM of 22 cm and 100 cm = 1,100 cm ∴ Minimum length required to be purchased to avoid any wastage = 11 m.
Two trains approach each other at 21 kmph and 25 kmph from 2 places 230 km apart. After how many hours they will meet?
Train 'E' leaves at 9:00 PM on Wednesday from Kolkata station and reaches Bangalore station at 11:00 AM the next day, while train 'F' leaves at 8:30 PM ...
A train covers a certain distance at a speed of 40 km/h and the next same distance with a speed of 70 km/h and the next same distance with a speed of 12...
A train 200 metre long takes 20 sec to cross a man running at a speed of 4 km/hr in the direction same to that of train. What is the speed of the train?
A train 460 metres long is running at a speed of 54 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:
Train ‘A’ running with a speed of 45 km/h crosses a pole in 4 seconds. If the time taken by train ‘A’ to cross train ‘B’ running with a spee...
A train 450 metre long takes 60 sec to cross a man running at a speed of 7 km/hr in the direction opposite to that of train. What is the speed of the tr...
Train A running with a sped of 126 km/h crosses a vertical pole in 22 seconds. Speed of train A is 6 m/s less than speed of train B, and length of train...
Two trains of same length are running in parallel tracks in the same direction with speed 64 km/hr and 100 km/hr respectively. The latter completely cro...
Two cars start from a place with a speed of 50 km/hr at an interval of 12 minutes. What is the speed of a man coming from the opposite direction towards...
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