Fertilizer must be applied to the planted area shown in the

Fertilizer must be applied to the planted area shown in the figure. If each bag covers 200 sq ft, how many bags are needed?

Solution

No. of square feet of the figure given here:

= .5*16*sqrt(17^2-16^2) + 13*16 + .5 * sqrt(22^2 - 16^2)*16

= 374.75 sq yd, since 1yd = 3ft, we have 374.75sq yd = 9*374.75 = 3372.75 sq ft

Now, 1 bag = 200ft

3372.75 sq ft is 3372.75 /200 bags = 16.86 bags or 17 bags