Question

a rectangular piece of plastic seat measure 1 metre by 70 cm find its cost at the rate of Rs 80 per square metre

Answer 1

we have to find the area of rectangular ,
so,
100cm =1 m
therfore,
70 cm =70/100 m
70cm=0.7 m

then
The area of rectangular piece= length × breadth
The area of rectangular piece =1×0.7 m
The area of rectangular piece= 0.7 m^2

so the the area of rectangular piece =0.7 m
cost of the plastic seat = area of rectangular piece × cost of 1 metre
cost of area of rectangular piece = 0.7 ×80
cost of area of rectangular piece =56 rs

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Answer 2

Answer:

Cost is Rs 56

Step-by-step explanation:

1. First convert 70 cm to metre, we know (1 metre = 100 cms) So, 70 cm = 0.7 metre
2. We know Area of rectangle = L×B so area of the seat = 0.7×1 = 0.7m²
3. Now it costs Rs 80 for 1 m² so for 0.7 m² it will cost Rs. 0.7×80 =Rs.56

Answer is Rs.56