Let total amount of work be 40 units Efficiency of ‘A’ = 40/20 = 2 units/day Efficiency of ‘B’ = 40/40 = 1 units/day Amount of work done by ‘A’ and ‘B’ together in 6 days = (2 + 1) × 6 = 18 units Time taken by B to complete remaining work = (40 – 18)/1 = 22 days
If the sum of three numbers is zero, then which of the options below will always be equal to the value of the sum of the cubes of those numbers?
Find the value x2 + y2, if xy = 13 and x + y = 7.
If cos(A - B) =√3/2and cot(A + B) = 1/√3, where A - B and A + B are acute angles, then (2A - 3B) is equal to:
Given that x8-34x4+1=0, x>0. What is the value of (x3+ x-3)?
If a =-10, b= -6 and c=18, then what is the value of (3abc)/4.
A shopkeeper marked his article 25% above its cost price and offered a discount of 30%. If cost price of the article is Rs. 560, then find profit or los...
The curved surface area of a cylinder is 462 cm² and its base area is 346.5 cm². What is the volume (in cm³) of the cylinder? (Use π =...
if 3y-3/y=8 then find the value of y ² +1/y²
