Question

raw a pictograpii lakiny Sultani
The length and breadth of a play ground are 75 m 20 cm , and 34 m 80 cm respectively. (i) Find the
cost of levelling it at Rs. 1.50 per square metre.
(ii) How long will a boy take to go three times round the field if he walks at the rate of 1.5 m per second
?​

Answer 1

Answer:

Length of first play ground : 75m

Breadth of first play ground : 34m

Area of first playground : length × breadth

: 75 × 34

: 2550sqm

Length of second playground : 20cm : 20/100: 0.2m

Breadth of second play ground : 80cm : 80/100

: 0.8m

Area of second playground : length × breadth

: 0.2 × 0.8

: 0.16sqm

Area of both the playground : 2550 + 0.16

: 2550.16sqm

Cost of levelling of 1 sqm : Rs1. 50

Cost of levelling of 2550.16 sqm : 2550.16 × 1.50

: Rs 3825.24

Speed of boy : 1.5m / second

time taken by boy to complete 1 rotation : 2550.16/ 1.50

: 1700.11sec

Time taken by boy to complete 3 rotation : 3 × 1700.11

: 5100.33

sec

Hope it helps...