A can finish a task in 13 days and B in 28 days. Working together, how many days will they take to complete the task? (Round to 2 decimal places)
$Time = (13 * 28) / (13 + 28) = 8.88 days.$
An item with cost price Rs. 5100 is sold at a profit of 17%. What is the selling price in rupees?
$Selling Price = 5100 * (1 + 17/100) = Rs. 5967.$
Find the remainder when 681 is divided by 13.
681 = 13 * 52 + 5.
The average mark of 10 students in Group A is 30 and that of 10 students in Group B is 40. What is the combined average mark of both groups?
Combined average = (10*30 + 10*40) / 20 = 35.0.
A can finish a task in 12 days and B in 25 days. Working together, how many days will they take to complete the task? (Round to 2 decimal places)
$Time = (12 * 25) / (12 + 25) = 8.11 days.$