A solid iron cuboid of dimensions 7 cm ,10 cm and 11 cm is melted to form a cylindrical pipe of height 20 cm .Find the radius of pipe.
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Answer:
radius of pipe=3.5
Step-by-step explanation:
Dimensions of cuboid=7cm, 10cm, 11cm
Volume of cuboid=7×10×11=770cm³
Volume of cuboid=Volume of cylinder
Vlolume of cylinder= 22/7× r² ×20
770=22/7× r²×20
r²=(770×7)/(22×20)
r²=49/4
r=7/2=3.5cm
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