Let total amount of work be 550 units Efficiency of ‘A’ = 550/22 = 25 units/day Efficiency of ‘B’ = 550/25 = 22 units/day Amount of work done by ‘A’ and ‘B’ together in 6 days = (25 + 22) × 6 = 282 units Time taken by B to complete remaining work = (550 – 282)/22 = 134/11 days
Two students appeared in an exam and one secured 20 marks more than the other. If marks of the student who got more marks is 60% of the sum of the marks...
In a group of three numbers first is double of second and half of third. The average of three numbers is 42. Find the difference between the first numbe...
240 students need to be arranged to sit in 12 rows. If the number of rows increases by 25%, then find the number of students who will now be sitting in ...
Find the average of first 19 whole numbers.
Sandeep can solve 20 questions in 1 hour. If he decreased his efficiency by 20%, then how much time would he take to solve the same number of questions?
If the first term is 125 and the common ratio is 3/5, then what will be the fourth term of the geometric progression (G.P)?
Find the number of even numbers between 12 and 30.
The sum of the five consecutive even numbers is 2720. The sum of the third and fifth numbers is:
A waiter income consist of his salary and tips. During one week his tips were 4/5 of his salary. What portion of his income came from tips?
