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4. Parikshit makes a cuboid of plasticine of sides 5 cm, 2 cm, 5 cm. How many suchcuboids will he need to form a cube?!

Answer»

l=5 cmb=2 cmperimeter=l×b =5×2 = 10 cm perimeter of square= 4a =4×10=40

20 is the right answer

l=5cm 👍b=2cm we know perimeter =l×b =5×2=10p of sq = 4a=4×10=40

Least Length of Cube =10

Volume of cube =10^3=1000

Dimensions of cuboid =5*2*5

Volume of cuboid =5*5*2=50

So number of Cuboid required to make a cube =1000/50=20 cuboids

★ Thus, 20 cuboids of dimensions 5*2*5 are,required to make a cube

20 is the best answer



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