Question

$\sf\red{Question:-}$

A playground is 38 50 cm long and 61 50cm wide.

a) the cost of levelling it at 40®rupees per m².

b) the number of round along the boundary one should take to run 2 km. ​

Answer 1

$\sf \bf \huge {\boxed {\mathbb {Answer}}}$

Let divide question in 2 parts

1. Cost of leveling:-

Length of field,l=38.50m or 38.5m

Breadth of field,b=61.50m or 61.5m

Area of rectangular field

=l×b

=38.5m×61.5m

=2367.75m square

Cost of leveling 1 m square= RS.40

Cost of leveling 2367.75 square

=Rs40×2367.75

=94,710/-

2.for running 2km rounds required

=2Km or 2000m/perimeter of rectangular field

=2000m/2(l+b)

=2000m/2(38.5m+61.5m)

=2000m/2(100m)

=2000m/200m

=10

Therefore,20 rounds should be taken to run 2km

Answer 2

Step-by-step explanation:

Annexure consists of the solution