CBSE BOARD X, asked by sahanasenthilkumar19, 1 month ago

Biscuit dough is laid in a rectangular tray of length 2.5m and breadth
1 m. Out of this,1000 biscuits of radius 2.8 cm each are cut out in the form of
a circular disc. How much area of the tray is left with wasted dough?​

Answers

Answered by amitnrw
0

Given :   Biscuit dough is laid in a rectangular tray of length 2.5m and breadth 1 m.

Out of this,1000 biscuits of radius 2.8 cm each are cut out in the form of a circular disc.

To Find :  How much area of the tray is left with wasted dough

Solution:

Biscuit dough is laid in a rectangular tray of length 2.5m and breadth 1 m.

Length = 2.5 m

Breadth = 1 m  

Area of tray  = 2.5 * 1  = 2.5  m²

radius 2.8 cm

Area of 1 biscuit = π (2.8)²

=  (22/7) (2.8)²

=  24.64 cm²

Area of 1000 biscuits = 1000 * 24.64 cm²

Area of 1000 biscuits in m² = 1000 * 24.64 / 10000

= 2.464  m²

area of the tray is left with wasted dough =  2.5  - 2.464  

= 0.036 m²

= 360 cm²

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