Question

PLZZ solve it(from 6-10)
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Answer 1

Answer:

Step-by-step explanation:

6) volume of cuboid=lbh

h=b(given)

448=7×b×b

⇒b=8

i.e length of square base is 8cm.

Surface area=2(lb+bh+lh)

Surface area=2(64+56+56)

⇒Surface area=352cm²

7)As length breadth and height is in the ratio 5::

it could be taken as 5x,4x,2x resp.

Total surface area =2(lb+bh+lh)=1216

⇒2(38x³)=1216

⇒x=4

∴length=20cm,breadth=16cm,height=8cm

Volume=lbh=20×16×8=2560cm³

8)given: length of reservoir=6m

breadth=3.5m

volume=lbh=6m×3.5m×h

42m³=21m²×h

⇒h=2m

∴depth=2m

9)

Answer 2

Answer:

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