Apps. and Interpretation for IBDP Maths Ebook 1 | Page 17

4. For a farm in the shape of a right-angled triangle, the lengths of the hypotenuse and the
shortest side are 39.063125 km and 10.937675 km respectively.
(a) Calculate L , the exact length of the remaining side.
[2]
The lengths of all sides of the farm are estimated by rounding off, correct to the nearest
0.01 km.
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(b)
(c)
Write down an inequality representing the error interval of the estimate of the
remaining side.
Calculate the percentage error in the estimate of the area.
[2]
[2]
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