Question

5. Prashant has undertaken a contract to build a wall of 9m long, 2.5m thick and 6m high. His
labour is to be calculated according to the number of bricks used to complete the wall. In the
market three types of bricks are available.
Type-1 :Each measuring 25cm x 11.25cm x 6cm
Type-I] : Each measuring 20cm x 8cm x 10cm
Type-III : Each measuring 25cm x 10cm x 9cm
Prashant used bricks of type III.
(a) Find the number of bricks of type III required to build the wall.
(b) In which case, maximum number of bricks will be used?​

Answer 1

Step-by-step explanation:

I hope it helps you....

Answer 2

60,000 bricks  of type III required to build the wall.

In type III , maximum number of bricks will be used

Step-by-step explanation:

dimensions of wall = L = 9 m

B= 2.5m

H = 6 m

volume of wall = 9×2.5×6 = 135 m³

dimensions of iii brick = 25×10×9

therefore , volume of brick iii =25×10×9 = 2250 cm³ = 0.00225 m³

number of bricks of type iii = $\frac{\text{volume of wall}}{\text {volume of 1 brick}}$

= $\frac{135 }{000225}$

= 60,000 bricks

now ,

volume of brick type 1 = 25×11.25×6 = 1687.5 cm³ = 0.0016875 m³

volume of brick 2 = 20×8×10 = 1600 cm ³ = 0.0016 m³

volume of brick 3 =25×10×9 = 2250 cm³ = 0.00225 m³

hence ,

60,000 bricks  of type III required to build the wall.

In type III , maximum number of bricks will be used

#Learn more:

55555 bricks are required to build a house and 22054 bricks are required to build a cow shed.What is required number of bricks?​

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