Question

a rectangular wall is 50 M long and 9M broad find the cost of painting the wall at the rate of 12 per square metre​

Answer 1

L=50m

B=9m

Area= L.B

=50.9=450m2

Cost= 450*12

= Rs.5400

Answer 2

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$we \: know \: that \: \\ the \: area \: of \: rectangular \: wall \\ is \: = lenth\times wide \\ so \: here \: given \\ lenth \: = 50 \: m \\ wide \: = 9 \: m \\ the \: area \: of \: the \: rectangular \\ = lenth \: \times \: wide \\ = (50 \times 9) {m}^{2} \\ = 450 {m }^{2} \\ given \: that \: the \: rate \: of \: per \: {m}^{2} \\ = 12 \\ so \: painting \: in \: 450 {m}^{2} \: area \: is \: taken \\ =( 450 \times 12) \\ =540 0 \: rs$

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the answer is 5400 rs ✔✔✔✔

✨✨hope it helps ✨✨