Question
An article is sold at a profit of 40%. If the purchasing
price triples and the selling price decreases by 20%, what will be the percentage of profit or loss?Solution
Let CP = 100 Profit = 40% Sp = 140 So now CP is Tripple, and the selling price is 20% less. then CP= 300 SP = 140×80/100=112 Loss = 300-112= 188 Loss% = (188/300) ×100 =62.6%
If x + 1/x = 2, find x⁷ + 1/x⁷.
Solve: 5 – 3x > 2x + 10
If p = 36 - q - r and pq + r(q + p) = 310, then find the value of (p² + q² + r²).
`sqrt(sqrt(10+sqrt(10+sqrt(10)) ... prop)` = ?
If (a + b) = 1 and (1/a) – 2b = 5/a then find the value of a2 + b2.
(p + 3) 2 + (q – 7) 2 + (r + 4)2 = 0, then find the value of p + q – r.
- If x² - 2x + 1 = 0, then find the value of (x³ + x⁻³)(x + x⁻¹).
- If n = 5 + √6, then find the value of (n + 1/n)².
Find the value of the given expression-
(4x+4 -5× 4x+2) / 15×4x – 22×4x
A solid metallic sphere of radius 15 cm is melted and recast into spherical balls of radius 3 cm each. What is the ratio of the surface area of the orig...