1.BY selling a Coat for $630, a shopkeeper gains 5%.find the cost price of coat
2.Paul Bought a car for $960 and sold it to David at a profit of 5%.David Sold it to Tommy at a profit of 10%.Find The money paid by Tommy for the car
If I sell something for n% profit, and I bought it for $x and sold for $y then
$\displaystyle \frac{y-x}{x}=\frac{n}{100}$,
which may be rearranged to give:
$\displaystyle y=x(1+\frac{n}{100})$.
If the shop keaper gains 5% that means s/he is selling for 1.05 times whatOriginally Posted by shaurya
s/he paid for it.
So if x is the buying price:
$\displaystyle 630=1.05 \times x$,
so:
$\displaystyle x=630/1.05$
Paul sold for:2.Paul Bought a car for $960 and sold it to David at a profit of 5%.David Sold it to Tommy at a profit of 10%.Find The money paid by Tommy for the car
$\displaystyle 960\times 1.05$
David sold it for what he paid times 1.10 so he sold it for:
$\displaystyle 960\times 1.05 \times 1.10$,
which is what tommy paid for it.
RonL