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HII HERE IS YOUR SOLUTION.......,
(Q9.)
surface area of cube=726 sq cm
6x^2 = 726
x^2=726/6
x=√121
x=11
volume=x^3
= 11^3
= 1331cm^3
(Q10.)
Volume of cube=512cm^3
x^3 = 512
x^3 = 8^3
x = 8
surface area= 6x^2
= 6×8×8
= 384sq cm
(Q11.)
BOX: l=1.4m=140cm
wide=75cm
height=49
V.of box = V.of soap
LBH = lbh×n
(n=no. of soap)
140×75×49=6×5×3.5×n
n=140×75×49/6×5×3.5
n=4900
there are 4900 soaps can be put in box.
THANKS.
(Q9.)
surface area of cube=726 sq cm
6x^2 = 726
x^2=726/6
x=√121
x=11
volume=x^3
= 11^3
= 1331cm^3
(Q10.)
Volume of cube=512cm^3
x^3 = 512
x^3 = 8^3
x = 8
surface area= 6x^2
= 6×8×8
= 384sq cm
(Q11.)
BOX: l=1.4m=140cm
wide=75cm
height=49
V.of box = V.of soap
LBH = lbh×n
(n=no. of soap)
140×75×49=6×5×3.5×n
n=140×75×49/6×5×3.5
n=4900
there are 4900 soaps can be put in box.
THANKS.
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