Question

18. A rectangular piece of plastic sheet measures 1 m by 70 cm. Find its cost at the rate of 80 per square​

Answer 1

Answer:

Rs 56

Step-by-step explanation:

Dimensions of the rectangular

plastic sheet :

Length ( L ) = 1 m

Breadth ( B ) = 70 cm = ( 70/100) m

B = 0.7 m

Area of the sheet = L × B

A = 1m × 0.7 m

A = 0.7 m²

It is given that ,

Cost of 1 sq m = Rs 80

Cost of the sheet = 0.7 × 80

= Rs 56

Answer 2

Answer:

$cost \: at \: the \: rate \: of \: 80 \: \: per \: {m}^{2} = ₹560000$

Step-by-step explanation:

$dimension \: of \: retangular \: \\ plastic \: sheet \: = 1m \: by \: 70cm \: \\ = 100cm \: by \: 70cm \\ \\ area \: of \: recangular \:plastic \: sheet \\ = (100 \times 70) {m}^{2} \\ = 7000 {m}^{2} \\ \\ rate \: = rs. \: 80 \: per \: {m}^{2} \\ \\ cost \: = rs.(\: 7000 \: \times 80) \\ = rs. \: 560000$