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.
  • a)
    Rs. 8820
  • b)
    Rs. 8125
  • c)
    Rs. 8610
  • d)
    Rs.8804
Correct answer is option 'A'. Can you explain this answer?

Class 5 Question

By PRASOON KUMAR · Aug 29, 2020 ·Class 5
SOUMYA DAS answered Aug 30, 2019
Area of larger rectangle
= (32x25) cm2 = 800cm2
Also, area of smaller rectangle = 485 cm2
Area of shaded part 22
= (800 - 485) cm = 315cm2
Now,
Cost of cementing of 3cm2 = Rs.84
Cost of cementing of 1 cm2
= (84/3)
= Rs.28
Cost of cementing of 315 cm2 
= Rs. (28x315) = Rs.8820

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