Can someone answer this please?

Question

A garden with a width of 8 feet and a length of 12 feet has a uniform walkway around it. The garden and the walkway cover and area of 252 square feet. what are the dimensions of the uniform walkway around the garden?

Answer 1

Total area=252 sq ft

Area of garden=8*12=96 sq ft

Area of walkway=252-96=156 sq ft

Walkway is around the garden, therefore its length is 20 ft (=6+12)

Walkway width=156/20=78/10=7.8 ft