Question

please solve this......​

Answer 1

We have,

Length of a 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

Rate of turfing = Rs. 2.50/m2

∴ Total cost of turfing = Rs. (1590.04 x 2.50) = Rs. 3975.10

Again,

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.

or,

Rate = 2 x 60 m/min = 120 m/min

Thus,

Required time to cover a distance of 528 m =

= 4 minutes 24 seconds [ since 0.1 minutes = 6 seconds]