This question was asked in Example 1
In example 1 of chapter 13 surfaces area and volume  we have to find slant height (l)  which is equal to ✓10.5625 3.0625   answer should be ✓13.6250 and you have added wrong plz check 

Screenshot_2018-11-18-13-30-42-564.jpeg   plz check 

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Tarwarmeet Kaur
Nov. 18, 2018, 1:33 p.m.