If the cost of k metres of cable wire is c rupees, then what is the cost of m metres of cable wire at the same rate?  Choose one
A) Rs. (mc)  B) Rs. (mc/k)  C) Rs. (kc)  D) Rs. (km/c)  E) None of these
Explanation :   Cost of k metres = Rs. c   Cost of 1 metre=Rs.(c/k)   Cost of m metres=Rs.[(c/k).m]=Rs.(mc/k)   Answer : Rs. (mc/k)
<result>B</result>
If the cost of k metres of cable wire is c rupees, then what is the cost of m metres of cable wire at the same rate?