Question
Cost price of an item is Rs.1250. It is marked up by x%,
then sold at a discount of (x – 6)%. The trader makes a profit of Rs.31. Find the marked price.Solution
ATQ, 1250 * (100 + x)/100 * (100 – (x – 6))/100 = 1250 + 31 1250 * (100 + x)/100 * (106 – x)/100 = 1281 (100 + x) * (106 – x) = 10248 10600 – 100x + 106x – x2 = 10248 x2 – 6x – 352 = 0 x2 – 22x + 16x – 352 = 0 x(x – 22) + 16(x – 22) = 0 (x – 22)(x + 16) = 0 x = +22, –16 x = 22 Marked price = 1250 * 122/100 = Rs.1525
Tungsten is used for the construction of filament in an electric bulb because of its
The instrument used to measure the speed of the wind is –
A heating element using nichrome connected to a 230 V supply draws an initial current of 3.2 A which settles after a few seconds to a steady value of 2....
Which of the following gas is used in the preparation of the bleaching powder?
Which one of the following statement regarding the sun is correct?
For what was Albert Einstein awarded Nobel Prize?
Two satellites are orbiting Earth at different altitudes. Satellite A is closer than Satellite B. Which of the following is correct regarding their spe...
Kindly Study the following questions carefully and choose the right answer:
Transpiration is mainly effective during _______ ?
A positive charge is initially at rest and then allowed to move freely in a region where there is a uniform electric field. What happens to its electri...
Relevant for Exams:
