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Let total work = 60 units (LCM of 20 and 15) Efficiency of ‘A’ = (60/20) = 3 units/day Efficiency of ‘B’ = (60/15) = 4 units/day Combined efficiency of ‘A’, ‘B’ and ‘C’ = (60/5) = 12 units/day Efficiency of ‘C’ = 12 – (3 + 4) = 5 units/day Required time taken = (60/5) = 12 days
A is cycling at an average speed of 20 km/hr such that he can reach a certain point at 12 noon. If he cycles at 30 km/hr, then he will reach the destina...
Which of the following can be true?
i. R reached the destination in 5hrs and P reached the destination in 3 hrs
ii. R reached the desti...
Speed of a car and a bus is 20 km/h and 10 km/h, respectively. If the time taken by the car to cover a distance of ‘9x’ km is 4 hour less than time ...
Two cars A and B travel from one city to another, at speeds of 72 km/hr and 90 km/hr respectively. If car B takes 1 hour lesser than car A for the jour...
Find the distance travelled (in km) by the truck to reach point B from point A, if a car cover 50% the same distance in 2 hours 30 minutes and a truck c...
A train covers a distance of 40 km at the speed of 30 km/h the next 33 km distance covers with a speed of 44 km/h and last 80 km with the speed of 64 km...
A boy goes to school with a speed of 45 km/h and comes back with a speed of 30 km/h. find his average speed?
The speeds of 'Pawan' and 'Qureshi' are in the ratio of 8:5. If the total time they take to individually cover 400 km each sums up to 65 hours, what is ...
A motor-cycle covers 110 km with a speed of 45 km/hr. find the speed of the motor-cycle for the next 110 km journey so that the average speed of the who...
Three people – Rohan, Suresh, and Tarun – run at speeds in the ratio 5:4:6. If Tarun takes 18 minutes to finish a race, how long will Rohan take to ...