Question

An estimate of the height, H metres, of a tall building can be found

Answer 1

Given that,

An estimate of the height, H metres, of a tall building can be found  using the formula :

H = 3f + 15

where the building is f floors high.

f = 85

The real height of the building is 260 m.

To find,

The percentage error.

Solution,

We have,

H = 3f + 15

Put f = 85 in the above formula

H = 3(85) + 15

H = 270 m

Error,

$E=\dfrac{270-260}{260}\times 100\\\\=3.84\%$

So, the required error is 3.84%.