Question

11) If the cost of painting a cubical block of wood at the rate of rupees 2.50 per sqcm is rupees 1500 find

a) The surface area of the block.

b) The edge of the block.

Answer 1

$\bf \underline {\boxed {\pink {The\: surface \:area\: of\: the\: block\: is\: 600 \:cm^2}}}$

$\bf \underline {\boxed {\pink {The \:edge \:of \:the\: block \:is \:10 cm}}}$

Step-by-step explanation:

GIVEN

Cost of painting a cubical block per cm = ₹2.50

Total Cost = ₹1500

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TO FIND

• The surface area of the block

• The edge of the block

_________________________________________

$\bf \underline {\boxed {\red { The\: Surface \:Area\: Of \:The\: Block }}}$

We know that,

Cost of painting a cubical block per cm id ₹2.50

Total Cost is ₹1500

So,

The area of block = 1500 / 2.50

The area of block = 600

$\bf \underline {\boxed {\pink {The\: area\: of \:block = 600\: cm^2}}}$

$\bf \underline {\boxed {\pink {The \:surface\: area \: of \: the \: block \:is \:600 \:cm^2}}}$

_________________________________________

$\bf \underline {\boxed {\red { The \:Edge \:Of \:The \:Block }}}$

We know that,

Surface Area Of Cube = 6 × Edge²

600 = 6 × Edge²

Edge² = 600 / 6

Edge² = 100

Edge = 10

$\bf \underline {\boxed {\pink {Edge = 10 \:cm}}}$

$\bf \underline {\boxed {\pink {The \:edge \:of \:the\: block \:is \:10 \:cm}}}$

Answer 2

Answer:

Answer is in attachment hope it helps