Question

A garden is in the shape of rectangle having width of 20 feet and length of 30 feet. If in the center of garden, circular plot of diameter 14 feet need to be made and other area need to be covered by plant, then find the cost of planting per ft2 if it is Rs. 20 per $ft^2$.

• A. Rs. 9,720
• B. Rs. 8,920
• C. Rs. 7,590
• D. Rs. 7,090

Answer 1

Answer:

B. Rs. 8,920

Width of rectangle = 20 feet

Length of rectangle = 30 feet

Area of rectangle = 20 × 30 = 600 ft²

Area of circular plot $=\frac{π}{4}\times{d^2}$

$=\frac{22}{28}\times{196}$

= 154 ft²

Difference in the area = Area of rectangle – Area of circular plot = 600 – 154 = 446 ft²

∴ Total costing of planting = $446\times{20}$ = Rs. 8,920