Question 8
Fractions, Decimals and ApproximationThe side of a rhombus is 10cm long, correct to the nearest whole number. Between what limits should the perimeter P lie?
- A.39cm ≤ P ≤ 41cm
- B.38cm ≤ P < 42cm
- C.38.5 ≤ P < 41.5cm
- D.38.5cm ≤ P ≤ 40cm.
Show the answer and explanation
Answer: B (38cm ≤ P < 42cm)
Explanation
The side lies from 9.5 cm up to (but not including) 10.5 cm. Multiplying by 4: 38 ≤ P < 42.