Find by the rectangle formula P = 2 (a + b) side b, if P = 316, a = 45m.
August 23, 2021 | education
| Given:
a = 45 m;
b =? m;
P = 316 m
P = 2 * (a + b) – where, a – length, b – width.
Let’s find the width of the rectangle:
2 * (45 + b) = 316;
90 + 2b = 316;
2b = 316 – 90;
b = 226: 2;
b = 113.
check: 2 * (a + b) = 2 * (45 + 113) = 2 * 158 = 316 – true
Answer: 113 m. Width of the rectangle.
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