The shaded part in the given figure is covered with cement. If it costs ` 84 to: cement an area of 2

3 cm , find the total cost of cementing.

3 cm , find the total cost of cementing.

- a)Rs. 8820
- b)Rs. 8125
- c)Rs. 8610
- d)Rs.8804

Correct answer is option 'A'. Can you explain this answer?

Related Test: Test : Perimeter And Area - 2

SOUMYA DAS
answered
Aug 30, 2019

Area of larger rectangle

= (32x25) cm^{2} = 800cm^{2}

Also, area of smaller rectangle = 485 cm^{2}Area of shaded part 22

= (800 - 485) cm = 315cm^{2}

Now,

Cost of cementing of 3cm^{2} = Rs.84

Cost of cementing of 1 cm^{2}

= (84/3)

= Rs.28

Cost of cementing of 315 cm^{2}

= Rs. (28x315) = Rs.8820

= (32x25) cm

Also, area of smaller rectangle = 485 cm

= (800 - 485) cm = 315cm

Now,

Cost of cementing of 3cm

Cost of cementing of 1 cm

= (84/3)

= Rs.28

Cost of cementing of 315 cm

= Rs. (28x315) = Rs.8820

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The shaded part in the given figure is covered with cement. If it costs ` 84 to: cement an area of 23 cm , find the total cost of cementing.a)Rs. 8820b)Rs. 8125c)Rs. 8610d)Rs.8804Correct answer is option 'A'. Can you explain this answer? over here on EduRev! Apart from being the largest Class 5 community, EduRev has the largest solved
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