Question

1.)Find the height of cylinder whose radius is 7 cm and total surface area is 968 cm² ?
2.) The rhombus is 240 cm² and one of the diagonal is 30 cm. find other diagonal.
3.) Find value of letter in of the following .
1.) 1 A
× A
= 9 A
2.) A B
× 6
=BBB

Answer 1

1)given that 
Height (h)=?
Radius (r)=7cm
T.S.A =968cm²
=>968=2πr(r+h)
=>968=2*22(7+h)
=>22=7+h
=>h=15
2)Given that
diagonal (d)=30cm
diagonal 2nd (D) =?
Area= 240 cm²
=>240=1/2*30*D
=>240/15=D
=>D=16cm
3)1)Given that
1A*A=9A
=>A²=9A
=>A²/A=9
=>A=9
2)AB*6=BBB
=>9*B*6=BBB
=>54*B=B³
=>54=B²
=>B=√54
=>B=3√6

Answer 2

1.radius=7cm
Total surface area=968cm^2
Total surface area=2πr(r+h)
968=2×22/7×7(7+h)
968=44(7+h)
968/44=7+h
22=7+h
22-7=h
h=15
2)for 2nd ans read the attachment.
3)
1)1A×A=9A
A×A=9A
A×A/A=9
A=9
2)A B×6=BBB
9×6B=BBB
54B=BBB
54=BBB/B
54=B^2
B=√54
B=7.34 approx.
hope it is helpful.
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