Q3 of 99 Page 264

The length and breadth of rectangular field of Birati Mahajati Sangha are in the ratio 4 : 3. The path of 336 meter is covered by walking once round the field. Let us write by calculating the area of the field.

Perimeter = 336m

Let length of the field be L, and breadth be B.


Perimeter of a rectangle = 2(L + B) = 336


Or L + B = 168


Given


3L = 4B


Or L =


Substituting the above result in L + B = 168,



On solving, we get B = 72


And since 3L = 4B, L = 96


Area = L × B = 96 × 72 = 6912m2


More from this chapter

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1

See the house of Kamal and let us find the answer.


(i) Let us write by calculating the area of Kamal’s garden.


(ii) Let us write by calculating how much cost is required to repair the floor of Kamal’s verandah, if Rs. 30 is the cost per square meter.


(iii) kamal wants to cover the floors of his reading room with tiles. Let us write by calculating how many tiles will be required to cover his floor of reading room with size of tiles 25 cm × 25 cm.

 2

Let us see the following pictures and calculate the area of its coloured part.

 4

The cost of farming a square land of Samar at the rate of Rs. 3.50 per sq. meter is Rs. 1,400. Let us calculate how much cost will be for fencing around its four sides with same height of Samar’s land at the rate of Rs. 8.50 per meter.

 5

The area of rectangular land of suhas’s is 500 sq. meter. If length of land is decreased by 3 meter and breadth is increased by 2 meter, then the land formed a square. Let us write by calculating the length and breadth of land of Suhas’s.