Question

SURFACE AREA
ANI VOLUME
lexcise 1301
i plastic box 1.5m long 1.25m.
Mide and 6.5cm deep to be made. It
is opened at loh find in the area of
shet requoried, find cost of Sheet
for it​

Answer 1

Step-by-step explanation:

csa of rectangle 2×(l+b)×h

it is open at the top and covered from the bottom

= lb

2 ×(1.5+1.25)×0.065 + 1.5×1.25

2×2.75×0.065 + 1.875

0.3575 + 1.875 = 2.2325

area of sheet is 2.23

Answer 2

Answer:

Length: 1.5m

Breadth: 1.25m

Height: 65cm and convert into m=0.65

The box is open at the top Area of sheet required = L.S.A + Area of the base

= 2 h( l+b)+(l)(b)

= 2(0.65)(1.5+1.25) + (1.5)(1.25)

= 1.30 (2.75) + 1.875

= 3.575 + 1.875

= 5.45 m²

if cost of measuring is given 1 m²

So,

the cost of sheet required = area of sheet * cost of measuring 1 m².

= 5.45 * 20

= 109