A train travels a distance of 300km at constant speed. If the speed of the train is increased by 5 km/kr, the journey would have taken 2 hours less. Find the original speed of the train.
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Light travels a certain distance in water in `3 mu` s . How much time it would take for light for travel the same distance in air ? Refractive index o
Correct Answer - `2.2 mu` s
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The half life of `._(90)Th^(225)` is 8 minutes How many half lives are there in 2 hours ? How long would you have to wait before there is less than 1
Correct Answer - `15; 53.15` min
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Machine A can produce 6 items per hour and machine B can produce 11 items per hours. If machine A works for x hours and B works for y hours in a day a
Correct Answer - `6x + 11y le 200`
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A man travels two-third part of his total distance with speed `v_(1)` and rest one-third part with speed `v_(2)`. Find out the average speed of the ma
Correct Answer - `(3v_(1)v_(2))/(v_(2)+2v_(1))
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A man travels half time of its journey with speed of 5m/s and for remaining half time he moves half of its total distance travelled, with speed of 3 m
Correct Answer - 4.5 m/s
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`L_(1)` metre train is moving with a velocity of `v_(1)` m/s and another `L_(2)` m/s in opposite dircetion. Find out (i) The time taken by two train t
Correct Answer - (i)`t=(L_(1)+L_(2))/(v_(1)+v_(2))` (ii)`d_(1)=v_(1)xx((L_(1)+L_(2))/(v_(1)+v_(2)))`,d_(2)=v_(2)xx((L_(1)+L_(2))/(v_(1)+v_(2)))`
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A swimmer takes 4 second in crossing some distance in downstream and taken 6 second in upstream for same distance then find the time taken by him to c
Correct Answer - 4.8 sec
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10. Lymph differs from blood in possessing (1) More proteins and less waste products (2) Less proteins and more waste products (3) More proteins and more waste products (4) Less proteins and less waste products
(2) Less proteins and more waste products
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The sun does not appear red during noon hours because the distance travelled by the sun rays in the atmosphere is less
D) Speed of light is constant when it has passed through medium for all colotus.
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Average speed : total distance/time taken :...............:displacement/time taken
A) average velocity
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