Question

The length and breadth of a playground are 80 m and 35 m respectively.

1. Find the cost of levelling it at rupees 4.50 per metre square.

2. How long will a boy take to go three times round a field, if he walks at rate of 1.5 m per second​

Answer 1

Answer:

First answer is = 12600 rupees

Second answer is = 4200 seconds

Answer 2

ANSWER:-

1. rs 12,600

2. 460 secs

STEP BY STEP EXPLANATION:-

Heya user❤️❤️❤️

1.

Length=80m

Breadth=35m

: . Area = (80*35)sqm

=2800 sqm

: . Cost of levelling = (2800*4.50)Rs

= 12,600 rs

Ans)-. 12,600 rs

2.

Perimeter = 2*(80+35)m

= 230 m

Now, the boy covers 3 times round the field...

: . The distance covered by the boy= 3*230 m

= 690 m

: . The time taken to walk 3 times round the field

= 690/1.5 secs

= 460 secs

Ans)- 460 secs