WAEC - Mathematics (1991 - No. 19)
In the diagram above, PXR and PYO are two semicircles with diameters 14cm and 7cm respectively. Find the perimeter of the region (take \(\pi\) = \(\frac{22}{7}\) )
22cm
33cm
40cm
47cm
66cm
Spiegazione
P = \(\pi\)r + \(\pi\)r + R = \(\frac{22}{7}\) x 7 + \(\frac{22}{7}\) x \(\frac{7}{2}\) + 7
P = 22 + 11 + 7 = 40cm
P = 22 + 11 + 7 = 40cm