Question

. The length and breadth of a playground
are 90 m 75 cm and 45 m 65 cm,
respectively. Find the cost of turfing it at
4.50 per square metre. How long will a
man take to go twice round the field, if he
walks at the rate of 2 metres per second?​

Answer 1

Step-by-step explanation:

Given that length of playground = 62 m 60 cm = 62.6 m [Since 10 cm = 0.1 m] Breadth of a playground = 25 m 40 cm = 25.4 m Area of a playground = Length x Breadth = 62.6 m x 25.4 m = 1590.04 m2 Given rate of turfing = Rs. 2.50/ m2 Total cost of turfing = (1590.04 x 2.50) = Rs. 3975.10 Perimeter of a rectangular field = 2(Length + Breadth) = 2(62.6 + 25.4) = 176 m Distance covered by the man in 3 rounds of a field = 3 x Perimeter of a rectangular field = 3 x 176 m = 528 m The man walks at the rate of 2 m/sec. Speed of man walks = 2 x 60 m/min = 120 m/min Thus, required time to cover a distance of 528 m = 528/120 = 4.4 min = 4 minutes 24 seconds [Since 0.1 minutes = 6 seconds]Read more on Sarthaks.com - https://www.sarthaks.com/690295/the-length-breadth-playground-are-and-respectively-find-the-cost-turfing-per-square-meter

Answer 2

Answer:

₹18642.32, 34min.32seconds