Question
Which one of the following scientist defined the
criteria of essentiality of nutrients in plants?Solution
The term essential mineral element (or mineral nutrient) was proposed by Arnon and Stout (1939).
Two trains started from stations ‘A’ and ‘B’ at same time and started travelling towards each other at speeds of 45 km/hr and 30 km/hr, respecti...
Two trains approach each other at 21 kmph and 24 kmph from 2 places 270 km apart. After how many hours they will meet?
A train crosses a platform in 48 seconds travelling with a speed of 120 km/hr. If the length of the train be 600 metres, then the length (in metres) of ...
Train ‘A’ can cross a pole in 10 seconds and a 200 metre long platform in 14 seconds. If the ratio of length of train ‘A’ and train ‘B’ is 2...
A train of length 180 m crosses another train of length 120 m coming from the opposite direction. If the speeds of the two trains are 6 m/sec and 9 m/se...
Two trains, 'A' and 'B', are heading towards each other from opposite ends of a 360-meter bridge. Train 'A' travels at a speed of 15 m/s, and train 'B' ...
A train takes 7 seconds more to cross a 210-metre-long platform than it takes to cross a pole. If a car running at the speed of 38 m/s takes 70 seconds ...
- A truck moving at 30 km/h is overtaken by a train in 20 seconds. If the train is travelling at twice the speed of the truck, calculate its length.
A train running with a speed of 45 km/hr can cross a pole in 10 seconds and a platform in 20 seconds. Find the length of the platform.
Distance between two stations ‘P’ and ‘Q’ is 620 km. Train A starts from ‘P’ at 8:30 a.m. with the speed of 32 km/hr. and train B starts fro...
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