Related Questions

A train takes 20 seconds to cross a pole. It takes 50 seconds to cross the platform. What is the ratio of the length of the platform to that of the train?
A 2 : 3
B 2 : 5
C 5 : 2
D 3 : 2
E None
A train takes 10 seconds to cross a pole and 20 seconds to cross a platform of length 200 m. What is the length of the train?
A 400m
B 600m
C 200m
D 800m
A train of length l, traveling at a constant velocity, passes a pole in t seconds .If the same train traveling at the same velocity passes a platform in 3t seconds, then the length of the platform is-------
A 0.5l
B l
C 1.5l
D 2l
A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the train is 54 km/hr, what is the length of the platform?
A 300 m
B 120 m
C 240 m
D None of these
A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?
A 120 m
B 240 m
C 300 m
D None of these
A train of length, 245 metres, takes 20 seconds to cross a 355 metres long bridge. How much time (in seconds) will the train take to cross a 390 metres long platform?
A 6.5
B 9
C 21.16
D 15
A train speeds past a pole in 15 seconds and a platform 100m long in 25 seconds. What is the length of the train?
A 50 meter
B 100 meter
C 150 meter
D 200 meter
একজন চাকরিজীবীর আয় ও ব্যয়ের অনুপার ২০ঃ ১৫ হলে, তার মাসিক সঞ্চয় আয়ের শতকরা কত অংশ?
A ৩০%
B ১৫%
C ২০%
D ২৫%
একটি ট্রান্সফরমারের প্রাইমারি ও সেকেন্ডারি তারের ঘূর্ণনের অনুপাত 20ঃ 1 এবং সেকেন্ডারিতে 20 omega রোধ লাগানো আছে। যদি প্রাইমারিতে 220 V প্রয়োগ করা হয় তাহলে এর মধ্যে বিদ্যুৎ প্রবাহ হবে-
A 0.55 A
B 27.5 mA
C 27.5 A
D 5.5 mA
The ratio of the speeds of a train and a man is 6:1. The length of the train is 650 m and crosses a pole in 1 minute 5 seconds. In how much time will the man cross the 240m long platform?
A 1min 24sec
B 2min 30sec
C 2min
D 2min 24sec

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