Question

the dimensions of a Courtyard were measured with the metre stick and hence its area was found to be 400 square metre later on it was dedected that the length of the metre stick actually measure 90 cm and not 1 metre find the correct area of the courtyard

Answer 1

Answer:

360 square meters

Step-by-step explanation:

Wrong Area = 400 Sq. m = 40000 sq. cm

Length of wrong meter stick = 1 m = 100 cm

40000 / 100 = 400 meter sticks were required to meter the area.

However , if the length of stick is 90 cm, then

400 x 90 = 36000 sq. cm will be the area,

1 m = 100 cm, hence the corrected area will be 360 square meters.

Answer 2

Answer:

324

Step-by-step explanation:

let the breadth is 40 m and length is 100 m.

Area of rectangle = Length×breadth

= 40 × 100 m

= 400 sq m

So, area of rectangle - length of rectangle

= 400 - 40 = 360

Now, 100- 10 = 90

360 × 90

= 32400

32400 ÷ 100 = 324

So, the correct area of courtyard is 324m