Answer:
240 cm (to the nearest ten)
Step-by-step explanation:
perimeter of a rectangle = 2W + 2L
where W is the width and L is the length
To estimate the perimeter, first round the components to the nearest ten then carry out the calculation.
Given:
- width = 46 cm ≈ 50 cm (nearest ten)
- length = 76 cm ≈ 80 cm (nearest ten)
⇒ estimated perimeter = 2 x 50 + 2 x 80 = 100 + 160 = 260 cm
Alternatively, to calculate the actual perimeter and then round the answer to the nearest ten:
⇒ actual perimeter = 2 x 46 + 2 x 76 = 92 + 152 = 244 cm
⇒ perimeter = 240 cm (to the nearest ten)
