The surface area of a cuboid is `1300\ c m^2dot` If its breadth is `10 c m\ a n d\ h e igh t s\ i s\ 20\ c m^2` , find its length.

Explanation

As we know that Surface area of cuboid = 2(lb+bh+hl)_____1

Given: S.A of cuboid is `1300 cm^2`

b=10cm and h=20cm

Now given part value put in 1

`1300 = 2(lxx10+10xx20+20xxl)`

`10l+200+20l=650`

`30l=650-200`

`30l=450`

...