1. Faman39

2. latremese40

i think 650

3. Faman39

Thank you

4. latremese40

ur welcome

5. Faman39

@satellite73, @Sufiyancs what do u guys think?

6. Faman39

I just need to understand, how will i get this ?

7. Sufiyancs

surface are of cuboid = 2(l*b)+2(bh)+2(l*h) so just divide the figure into 2 parts

8. Sufiyancs

therefore, surface area of 1 cuboid = 2(10*5)+2(5*5)+2(10*5)

9. Sufiyancs

that is equal to 250 and then surface area of 2 cuboid = 2(20*5)+2(5*5)+2(20*5)=450

10. Sufiyancs

therefore total surface area is 250+450=700 But as i have counted one line twice just the one next to 15 so the actual answer is 700-50=650

11. Sufiyancs

if u dont get the last part divide the figure into 3 parts

12. Faman39

Thank you so much guys for helping :) thanks alot @Sufiyancs !!! you guys are truly awesome!!!!!!

13. Sufiyancs

ammm sorry its 750... this is how we do it.. 2(5*5)+2(5*5)+2(5*5)=150 2(10*5)+2(5*5)+2(10*5)=250 2(15*5)+2(5*5)+2(15*5)=350 Total surface area= 150+250+350 = 750cm Square

14. Faman39

Oh ok :) thank you so much!

15. Sufiyancs

i have divided it into 3 parts as i said before

16. Sufiyancs

anytime

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