Question
A train covers a distance of 84 km at the speed of 42
km/h the next 45 km distance covers with a speed of 30 km/h and last 60 km with the speed of 40 km/h find the average speed of the train?Solution
Since the train covers different distance with different speeds. So, Average speed = Total Distance/Total Time Total distance = 84 + 45 + 60 = 189 km Time1 = 84/42, Time2 = 45/30 & Time3 = 60/40 Total Time = 84/42 + 45/30 + 60/40 Therefore, Average Speed = 189/(84/42 + 45/30 + 60/40) = 37.8 km/hr
Statements:
All rollers are coasters.
Some swings are rollers.
All bridges are swings.
Conclusions:
I. All coaste...
Statements:
Some bells are temples.
Some temples are marbles.
Conclusions:
I. Some bells are marbles
II. No m...
In the questions given below, there are three statements followed by three conclusions I, II and III. You have to take the three given statements to be...
Statements:
All summers are winters.
Only a few summers are spring.
Some springs are autumn.
No autumn is season.
...
All foxes cannot be huts. No look is a hut.
Three statements are given, followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at varian...
Statement: Â Â Â Â
Only Cricket is Kabaddi.
Some Cricket is Football. Â Â Â Â
Conclusion: Â Â Â Â
I. All Cricket are ...
In the questions given below, there are three statements followed by three conclusions I, II and III. You have to take the three given statements to be...
Statements:
Only a few balloons are cakes.
All cakes are knife.
Some knife are ribbons.
Only a few ribbons are candles.
...Statements: All watches are wall clocks.
Some wall clocks are calculators.
Conclusions: I. No watch is a calculator.
II. Some cal...
Relevant for Exams:
