A and B can do a piece of work in 10 days. B and C in 15 days C and A in 30 days. In how many days can they do it all working together?
Correct answer D. 10 days
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ECAT Math MCQs
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A certain number of men could complete work in 40 days. If there were 20 men more the work could be completed in 20 days. The original number of men is
Correct answer D. 20
Ahmar works twice as fast as Bina. If Bina can complete a work in 30 days the number of days taken by Ahmar and Bina to complete the work working together is
Correct answer D. 10 days
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X can do a job in 16 days Y can do the same job in 20 days X Y and Z can do the job in 7.5 days. Alone Z can do the same job in
Correct answer D. 48 days
Asghar can do a job in 60 days. And both Asghar and Babar can do the same job in 20 days working together. Babar alonge can do the some job in
Correct answer A. 30 days
Alia can complete an assignment in 5 days and Babar can complete the same assignment is 20 days. The time taken by both Alia and Babar to complete the assignment working together is
Correct answer C. 4 days
If A can do a job in 10 days another person B can do the same job in 20 days then time required to do the job when both of them working todether.
Correct answer D. 20?3
If As 1 days work = 1/20 then time required to finish the job (in days)
Correct answer A. 20
If A can do a piece of work in 10 days then part of work done by him in one day.
Correct answer C. 1?10
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An inlet pipe can fill a tank in 10 hrs and an outlet pipe empties the same full tank in 20 hrs. The time required to fill the tank when both pipes are opened.
Correct answer B. 20
If an outlet pipe empties a full tank in 20 hrs then part of tank emptied in one hour.
Correct answer D. 1?20
If an inlet pipe fills a tank in 10 hrs and another inlet pipe fills the same tank in 5 hrs then time required to fill the tank when both pipes are opened.
Correct answer A. 10?3
If part of tank filled in one hour = 1/10 then time required to fill the tank.
Correct answer C. 10
If an inlet pipe fills a tank in 10 hrs then part of tank filled in 1 hr.
Correct answer B. 1?10
A man travels 120 Km to a town. He could have reached the town 2/5 hrs. earlier had he increased his speed by 15 km/h. Find the speed at which he travels?
Correct answer C. 60
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A man traveling an hour by car and another hour by plane covers a total distance of 850 Kms. If the average speed of plane taken by the man was 16 times that of the car. What was the distance covered by the car.
Correct answer B. 50
A lorry travels from town A to town B at 54 km/h. A car travels from town B to town A at 80 Km/h. If both vehicles start their journeys at the same time and meet each other at the way after traveling for 1 hour 30 minutes. Find the distance between town A and town B.
Correct answer D. 201
Mr. Khan went for a trip in his car which travels 14.5 km on 1 liter petrol. The reading of speedometer was 19034. )-Km when he started his journey and read 19396.5 Km after he had completed his journey. How many liters of petrol are consumed?
Correct answer A. 25
A car travels 65 kms from A to B in 70 minutes and 80 km from B to C in 75 minutes. Find the average speed in km/h of the car for the whole journey?
Correct answer D. 60
Car A travels 64 kms in 30 minutes car B travels 178 kms in 2 hrs 15 minutes. Which car is traveling faster?
Correct answer A. Car A