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By melting a solid cuboid of length 16 cm , 11 cm, 10cm, how many coins can be made of 0.2 cm thick and 2 cm diameter.
1) 220

By Iris

By melting a solid cuboid of length 16 cm , 11 cm, 10cm, how many coins can be made of 0.2 cm thick and 2 cm diameter.
1) 2200 2) 2400 3) 2600 4) 2800
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Iris

suppose that w=x3y2z4, x=t2, y=t+2, z=2t2 find the rate of change of w with respect to t at t=1 by using the chain rule, and then

At % per annum simple interest, simple interest on Rs. x for 20 years is equal to
4/9 th of its amount for that period. Find

1 thought on “By melting a solid cuboid of length 16 cm , 11 cm, 10cm, how many coins can be made of 0.2 cm thick and 2 cm diameter.<br />1) 220”

  1. Given
    Length,l = 16 cm
    Breadth,b = 11 cm
    Height,h = 10 cm
    Radius,r = 1 cm
    Thickness,H = 0.2 cm

    Solution
    Volume of cuboid = l*b*h
    = 16*11*10
    = 16*110

    Volume of coin = pi*r*r*H
    = (22/7)*1*1*0.2
    = (22/7)*0.2

    Number of coin = volume of cuboid/volume of coin

    = {16*110}/{(22/7)*0.2}
    = (16*110*7)/(22*0.2)
    = (16*10*7)/(2*0.2)
    = (8*10*7)/(1*0.2)
    = 560/0.2
    = 2800

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