Pa help po sa math.Thank you po.
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ANSWER:
SA of sphere=1017.36cm
second sphere=706.5cm
SA of square pyramid
SA=74.4cm
SA of cone=703.36dm
EXPLANATION:
Surface area of sphere
formula is SA=4πr²
given:
r=9cm
SA=4(3.14)(9)²
SA=12.56(81)
SA=1017.36cm
2.Given:r=7.5cm
SA=4(3.14)(7.5)²
SA=12.56(56.25)
SA=706.5cm
square pyramid formula
SA=2bs+b²
given:
b=6cm
s=3.2cm
SA=2(6)(3.2)+(6)²
SA=2(19.2)+36
SA=38.4+36
SA=74.4cm
Surface area of a cone
formula:SA=πrs+πr²
given:
r=8dm
s=20dm
SA=3.14(8)(20)+3.14(8)²
SA=3.14(160)+3.14(64)
SA=502.4+200.96
SA=703.36dm