Question
Speed of a boat in still water is 3 times more than the
speed of stream. If boat covers 90 km in downstream in 6 hours, then find the time taken by the boat to cover 63 km in upstream.Solution
Let the speed of stream be ‘x’ km/hr. So, speed of boat in still water = 4 × x = 4x km/hr Downstream speed of boat = 4x + x = 5x km/hr According to question; 5x = 90/6 = 15 Or, x = 3 Upstream speed of the boat = 4x – x = 3x = 3 × 3 = 9 km/hr Required time taken = 63/9 = 7 hours
Statement:
Only few Red are yellow
No yellow are white.
Only green are white.
Conclusion:
I. Some yellow are red...
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All needles are ropes.
Some ropes are buckets.
All buckets are trees.
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Some children are parents.
All parents are infants.
Some infants are adolescent.
Conclusions:
I. At least...
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Every Demand are Supply.
Few Supply are Inflation.
Only a few Inflation are Deflations.
Conclusions:
I. A...
Statement:Â
Only a few scale are erasers.     Â
No eraser is a pen.      Â
Only colours are pens.       Â
...Statements:
All Players are Teams.
All Teams are Sports.
Only a few Sports are Games.
Only Games are Groups.
<...Statements:Some pastries are cakes.
No cake is a pudding.
All puddings are sweets.
Conclusions:I. Some sweets are not cakes.
, In the question below some statements are given followed by two conclusions I and II. You have to take the given statements to be true even if they s...
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