Question
There are 9 cups placed on a table arranged in equal
number of rows and columns out of which 6 cups contain coffee and 3 cups contain tea. In how many ways can they be arranged so that each row should contain at least one cup of coffee?Solution
The correct answer is D
A boy goes to school with a speed of 50 km/h and comes back with a speed of 30 km/h. find his average speed?
- A train departs station 'Z' at 5:15 AM traveling at 90 km/h. Another faster train leaves the same station at 7:00 AM traveling at 120 km/h. At what time wi...
A train has to cover a distance of 90 km in 15 hours. If it covers half the journey in 4/5 th of the time, the speed to cover remaining distance in the ...
Bus P takes 30 minutes to cover a distance of 60 km. If bus Q is 20% faster than bus P. Find the time taken by bus Q to cover the same distance?
A car travels a distance of200 km at the speed of 50 kmph. If it covers the ne×t 160 km of its journey at the speed of 80 kmph and last 80 km of i...
A person travels 240 km partly by car and partly by train. He spends 2 hours more traveling by train than by car. The speed of the car is 60 km/h, and t...
If a man cycles at 10 km/hr, then he arrives at a certain place at 1 p.m .If he cycles at 15 km/hr, he will arrive at the same place at 11 am At what sp...
In a 1.6 km race, 'A' gives 'B' a head start of 300 meters, but still 'A' wins the race by 100 meters. If 'B' takes 15 minutes to complete the race, cal...
Train ‘A’ running with a speed of 54 km/hr. can cross a standing goods train of 4 times its length in 20 seconds. Find the time taken by 240 meters ...
A man travels some distance at a speed of 16 km/hr and returns at a speed of 12 km/hr. If the total time taken by him is 2 hrs 20 min, the distance is <...
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