Find volume of frustum whose radius are 7 and 3.5cm and height is 10cm
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Answer:
vol = 89.8333 cm³
Step-by-step explanation:
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VOL OF FRUSTUM= 1/3 π h(r1² + r2²+ r1r2)
=1/3 x 22/7 x (49 +12.25 +24.5)
=1/3 x π x 8575/100
= 22/3 x 1225/100
=11 x 49/6=539/6=89.833 cm³
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