Question
A dishonest seller, at the time of selling and
purchasing uses weight 22% less and 30% more per kg respectively. Find the approx. percent profit earned by him if he claims that he sells his goods at cost price.Solution
C.P of 1300 gm= Rs 1000 CP of 780 gm= Rs 600 SP of 780 gm = Rs 1000 % profit = 400/600*100 = 66.66% approx.
If 2x + (1/9x) = 5, then find the value of 81x2 + (1/4x2) - (1785/4)
‘a’ is directly proportional to ‘b’. If at a=30, the value of ‘b’ is 20% greater than ‘a’, then find the value of ‘a’ when b=54.
...(288 ÷ 8)² × (144 ÷ 24)³ = 24 × ? × (51840 ÷ 20)
((99.9 - 20.9)² + (99.9 + 20.9)² )/(99.9 x 99.9 + 20.9 x 20.9) = ?
...If a = 32, b = c = 31, then find the value of a 3 + b 3 + c 3 – 3abc.
If a = 2 + √3, then the value of (a6 + a4 + a2 + 1)/a3 is
Calculate the value of the expression: {2 X (P3 - Q3) - 30 X P X Q} if (P - Q) = 6 and (P2 + Q2) = 80
when x =4 and y =-6 then find the value of 27x³ +58x²y +31xy² +8y³?