Answer:
The diameter will be given by 50 cm ÷ 3.142 = 15.9134 cm
The radius will be 15.9134 ÷2 = 7.9567 cm or about 7.96 cm
The area of a circle is given by \pi × square of radius
Area = 3.142 × 7.96×7.96 = 199.0821 square cm
800/6=x/16 6x=12800 divide and get 2133 1/3
10-4=6
3*2k= 6k
6k=6
K=1 is the answer