Hiw many sperical bulllets each if 5cm in diameter can be cast from a rectangular block of metal 11dm×1m×5dm
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Rectangular block..
l=110cm
b=100cm
h=50cm
volume = lbh
= 110×100×50
= 55,000cm³ _____(i)
Spherical Bullets...
d = 5cm , r = 5/2cm
Volume = 4/3πr³
= 4/3×22/7×5/2×5/2×5/2
= 88/21×5/2×5/2×5/2
= 88/21 × 125/8
= 11/21×125
= 65.45cm³ ____(ii)
No. of bullets = 55,000/65.45
= 840bullets , 0.33extra
l=110cm
b=100cm
h=50cm
volume = lbh
= 110×100×50
= 55,000cm³ _____(i)
Spherical Bullets...
d = 5cm , r = 5/2cm
Volume = 4/3πr³
= 4/3×22/7×5/2×5/2×5/2
= 88/21×5/2×5/2×5/2
= 88/21 × 125/8
= 11/21×125
= 65.45cm³ ____(ii)
No. of bullets = 55,000/65.45
= 840bullets , 0.33extra
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