Question

this question pls help

Answer 1

TSA of whole toy = πr(l+R)-πr²+2πrh
22/7(31.24+20-400+480)
= 22/7×131.24
= 18.74×22
= 412.28cm² ans.

Answer 2

h 1 = 24cm h2 = 60-24 = 36cm

r1= 10cm r2 = 5cm

$tsa = \pi \: r1l + \pi \: r 2{}^{2} + 2 \pi \: r2h2$

$\pi \:( r1l \: + r 2 {}^{2} + 2r2h + r2 {}^2 - r1 {}^2 )$

$l \: = \sqrt{h {}^{2} + r 1{}^{2} }$

$l = \sqrt{576 + 100} = \sqrt{676}$

$l = 26cm$

Now putting values in formula

$3.14(10 \times 26 + 5 {}^{2} + 2 \times 5 \times 36 + 10{}^2 - 5 {}^2)$

$3.14(260 + 25 + 360 + 100 - 25)$

$tsa = 2260.8cm {}^{2}$

Thanks