Question

The price of pipe is 20 rupees a metre. Unni bought 15 metres of pipe. How much money did he spend ?

Answer 1

$price \: of \: pipe \: per \: metre = rs20 \\ length \: of \: pipe \: = 15 \: metres \\ cost \: of \: 15 \: metres \: of \: pipe \: \\ = \: 20 \times 15 \\ = rs300$