Question

A well of diameter 140cm has a stone parepet around it . If the lenght of the outer edge of the parepet is 616cm . Find the width of the parepet.

Answer 1

6. A well of diameter 140 cm has a stone parapet around it. If the length of the outer edge of the parapet is 616 cm, find the width of

Given:

Diameter of the well (d) = 140 cm.

Radius of the well (r) = cm = 70 cm

Let the radius of the outer circle (including the stone parapet) be R cm.

Length of the outer edge of the parapet = 616 cm

⇒ R =  cm = 98 cm

Now, width of the parapet = {Radius of the outer circle (including the stone parapet) - Radius of the well}

                                           = {98 -70} cm = 28 cm

Hence, the width of the parapet is 28 cm.