CBSE Class 10 Answered
8th one
![question image](http://images.topperlearning.com/topper/new-ate/top_mob167172013362529602dc676023-5d2b-472c-81f4-890d2625d1fe.jpg)
Asked by pentikalyanram | 22 Dec, 2022, 20:12: PM
Curved surface area = (
r l )
![begin mathsize 14px style pi end style](https://images.topperlearning.com/topper/tinymce/cache/6bef19d56ca8702b84be9f77acbea57c.png)
where r is radius of base and l is slant height
Curved surface area = (
r l ) = 12320 cm2
![begin mathsize 14px style pi end style](https://images.topperlearning.com/topper/tinymce/cache/6bef19d56ca8702b84be9f77acbea57c.png)
slant height = 12320 / (
r ) = 12320 / (
56 ) = 70.03 cm
![begin mathsize 14px style pi end style](https://images.topperlearning.com/topper/tinymce/cache/6bef19d56ca8702b84be9f77acbea57c.png)
![begin mathsize 14px style pi end style](https://images.topperlearning.com/topper/tinymce/cache/6bef19d56ca8702b84be9f77acbea57c.png)
Height of cone, h = ![begin mathsize 14px style square root of l squared minus r squared space end root space equals space square root of left parenthesis 70.03 right parenthesis squared minus space left parenthesis 56 right parenthesis squared end root space equals space 42.05 space c m end style](https://images.topperlearning.com/topper/tinymce/cache/8e4dec31ff81afcb63e341370e534d81.png)
![begin mathsize 14px style square root of l squared minus r squared space end root space equals space square root of left parenthesis 70.03 right parenthesis squared minus space left parenthesis 56 right parenthesis squared end root space equals space 42.05 space c m end style](https://images.topperlearning.com/topper/tinymce/cache/8e4dec31ff81afcb63e341370e534d81.png)
Answered by Thiyagarajan K | 22 Dec, 2022, 22:09: PM
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