Let the capacity of the tank be ‘20’ litres {LCM (10, 20)} Efficiency of pipe ‘A’ = (20/10) = 2 litres/minute Efficiency of pipe ‘B’ = (20/20) = 1 litres/minute Quantity of water filled by pipe ‘A’ in 4 minutes = 4 × 2 = 8 litres Quantity of water to be filled = 20 – 8 = 12 litres Time taken by pipe ‘A’ and ‘B’ together to fill 12 litres of water = {12/(2 – 1)} = 12 minutes Total time taken = 4 + 12 = 16 minutes
If x4 + 2x3 + ax2 + bx + 9 is a perfect square, where a and b are positive real numbers, then the value of a and b are
If (x - 1/x)2 = 3, then the value of x6 + 1/x6 equals
IfX = (√5 + 1) / (√5 – 1) and y = (√5 – 1) / (√5 + 1) then the value of(x 2+xy+y
If a + b + c = 0 then the value of (1/(a+b)(b+c)) + (1/(b+c)(c+a)) + (1/(c+a)(a+b)) is
Quantity I – 3
Quantity II – 254
If > 0 and < 0
If α and β are the roots of equation x2 – x + 1 = 0, then which equation will have roots α3 and β3?
...Which is the largest six digit number, which when divided by 12, 15, 20, 24 and 30, leaves the remainders 8, 11, 16, 20 and 26 respectively.
is equal to:
The value of = 3/4 ÷ 3/4 of 4/3 + 5/2 ÷ 2/5 of 5/4 – (2/3 + 2/3 of 5/6) is :
The value of the expression (1 + sec22° + cot68°)(1 – cosec22° + tan68°) is
