Question

A rectangular garden is 120 m long, and 90 m wide. In the middle of the ground,
circular tank of radius 21 m. Find the cost of turting the remaining portion at the rate of 4.50 per square metre​

Answer 1

Answer:

Area of the flower bed = a2 Area of the gravel path = 100 – a2 Area of total garden = 100 Given cost of flower bed + gravelling = Rs 364 3a2 + 4(100 – a2) = Rs 364 3a2 + 400 – 4a2 = 364 ∴ a2 = 400 – 364 = 36 ⇒ a = 6 Width of gravel path = (10 - 6)/2 = 4/2 = 2 cmRead more on Sarthaks.com - https://www.sarthaks.com/940422/there-square-field-whose-side-square-flower-prepared-centre-leaving-gravel-round-flower