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Total work = 48 (LCM of 16 and 12) Efficiency = Work/Time Total efficiency = 3 + 4 = 7 units Remaining work after 4 days = 48 - (7 × 4) = 48 - 28 = 20 units Time is taken by B to finish the remaining work = 20/4 = 5 days Total number of days B work = 4 + 5 = 9 days ∴ B work the total number 9 days to finish the work completely.
The average age of 10 men is increased by 2 years when two of them whose age are 24 and 26 years replaced by two new men. The average age of the two ne...
In a class of ‘x’ students, if a new student weighing 32 kg joins the class, then the average weight of the class increases by 1 kg. If the ...
The average salary of 36 employees ( Teachers+principals) in a School is Rs.10,375. A Principal in the School receives a salary that is 125% higher than...
The average cost of three chairs is Rs.10000. The average cost decrease by 12% when one more chair is included. What is the cost price of the 4th
What will be the average of odd numbers between 20 to 74?
Average of 20 numbers is 90. Average of first 8 numbers is 92 while average of last nine numbers is 40. If ninth number is 25% less than the tenth numbe...
A class of 39 students has an average test score of 24. When the score of the topper is added, the average score of the group increases to 24.25. What ...
The average height of the boys in a class is 160 cm, while the average height of the girls is 155 cm. The overall average height of all students in the ...
The average weight of 7 men decreases by 3 kg when one of them weighing 150 kg is replaced by another person. Find the weight of the new person
The average runs of a bowler increased by 4 runs when he took 144 wickets in his 40th match. Find the average wickets taken by the bowler after 40 matches.
