Question

solve the circled questions pleaseee ✌✌✌​

Answer 1

Step-by-step explanation:

4. radius in case 1 (r) = 7cm

radius in case 2 (r') = 14cm

ratio of their surface areas = 4πr²/4πr'²

= (r/r')²

= (7/14)² = 1/4

6. SA. of sphere = 4πr²

154 = 4*22*r²/7

r² = (154*7)/(22*4)

r = √(7²/2²)

r = 7/2 = 3.5cm

8.inner radius = 5cm

thickness = 0.25cm

outer radius(r) = 5+0.25 = 5.25cm

CSA of hemisphere = 2πr²

= 2*22*5.25/7

= 44*0.75

= 33cm²

What a coincidence I am in the same class as u...and we've done this question several times

hope it helps :D

Answer 2

Answer:

☺

ji bilkul me achhe SE exam dungi

10 th meko jada mark Lane he

isliye jada padhai karna hoga

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aap ki wishes Jo mere saath he ♥