Question

A man sold 18 cots for Rs. 16,800, gaining thereby the cost price of 3 cots. The cost price of a cot is

• A. Rs. 650
• B. Rs. 700
• C. Rs. 750
• D. Rs. 800

Answer 1

Answer: (D)

Rs. 800

Given number of cots $=18$

Gain $=$ $3$ cots

Gain$\%$$=$ $\frac{Gain}{C.P}\times 100$

$=\frac{3}{18}\times 100=16.66\%$

Let $x$ be the $C.P$ of $18$ cots

$S.P=x+16.66\%ofx$

$16800=1.166x$

$x=14400$

$C.P$ per cot = $\frac{14400}{18}$ = $Rs.800$