Question
If A can complete a job in 15 days and B can complete
the same job in 10 days, and they work together for 4 days before A leaves. How many more days will B take to finish the job alone?Solution
A's work rate = 1/15; B's work rate = 1/10. Combined work rate = 1/15 + 1/10 = (2 + 3) / 30 = 5/30 = 1/6. Work done in 4 days = 4 * (1/6) = 2/3. Remaining work = 1 - 2/3 = 1/3. B's time to finish remaining work = (1/3) / (1/10) = (1/3) * 10 = 10/3 = 3.33 days.
Statements:
B ≥ K ≤ C; Q > K > X; M = Q < P
Conclusions:
I. P > X
II. C ≥ M
If ‘+’ stands for ‘division’; ‘×’ stands for ‘addition’; ‘–’ stands for ‘multiplication’; ‘÷’ stands for ‘subtraction�...
What will be the value of expression if the numbers/digits ‘(8)’ and ‘(9)’ are interchanged?
168 ÷ 6 × 32 ÷ 9 × 7 + 8 + 11
...In a given code form:
P + Q means P - Q
P ÷ Q means P × Q
P × Q means P + Q
P - Q means P ÷ Q
What is the correct...
87 D 29 A 12 B 5 C 9 = ?
If in a certain code language ‘+’ represents ‘×’, ‘–’ represents ‘+’, ‘×’ represents ‘÷’ and ‘÷’ represents ‘–’....
Which two signs should be interchanged in the following equation to make it correct?
24 + 12 ÷ 6 - 8 x 2 = 92
If P is coded as '÷', Q is coded as '+', R is coded as '-' , and S is coded as 'x' , then what is the value of the following expression?
24 P...
Mohit and Sudesh bought pens and notebooks from the same shop. Mohit bought 3 pens and 6 notebooks by paying an amount of ₹180. Sudesh bought 5 pens a...
Which two signs should be interchanged to make the below equation mathematically correct?
9 ÷ 3 + 6 – 6 × 2 = 30
