Question

10. A closed rectangular box has inner dimensions 90 cm by 80 cm by 70 cm. Calculate its
capacity and the area of tin-foil needed to line its inner surface.​

Answer 1

Answer:

dimensions ⇨( 90,80,70 )cm

Capacity means to find it's volume

so ,the required volume of the rectangular box is

(90×80×70)cm³

504,000 cm³

it's capacity is 504,000cm³

Now to find the area of tinfoil needed to line it's inner surface is given by

2(90×80+80×70+70×90)cm²

2×(7200+5600+6300)

38,200 cm²