Question

4. A dosed glinancal tank of modus 7 m and height 3 m is made from a sheet of metal How much
sheed meal is required?​

Answer 1

${ \bold{ \underbrace{ \bf{Correct \: question :}}}}$

A closed cylindrical tank of radius 7 m and height 3 m is made from a sheet of metal. How much sheet of metal is required?

${ \bold{ \underbrace{ \bf{ Required \: Answer :}}}}$

${ \bf{ \underline{Given :-}}}$

• Radius of cylindrical tank ( r ) = 7m
• Height of cylindrical tank ( h ) = 3m

${ \bf{ \underline{To \: find :-}}}$

• How much sheet of metal is required ?

${ \bf{ \underline{Solution :-}}}$

${ \sf{We \: know \: that,}}$

$★{ \boxed{ \boxed{ \orange{ \bf{Total \: Surface \: Area \: of \: cylindrical \: tank = 2\pi \: r(h+ r)}}}}}$

${ \sf{Here, }}$

$★{ \boxed{ \boxed{ \bf{ \orange{ \pi = \frac{22}{7} }}}}}$

〘 Substituting the values as per the formula :- 〙

$↣ \: { \sf{2 \times \frac{22}{7} \times 7(7 + 3)}}$

$↣ \: { \sf{2 \times \frac{22}{ \cancel7} \times \cancel7(7 + 3)}}$

$↣ \: { \sf{2 \times 22 \times 10}}$

$↣ \: { \sf{44 \times 10 = { \boxed{ \blue{ \sf{440 \: m {}^{2} }}}}}} \star$

Hence, 440 m² sheet of metal is required.

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Answer 2

Refer the above attachment it is correct