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Arun Dhouchak

· started a discussion

· 1 Months ago

area should be 2/3 of original (Question: 367589.0 )

2 sa kon multiply karega

Question:

AD is the diameter of a circle with area 707 m2 and and AB = BC = CD as shown in the figure above. All curves inside the circle are semicircle with their diameters on AD. What is the cost of levelling the shaded region at the rate of Rs.63 per square metre? 

  

Options:
A)

Rs.29,700

B)

Rs.22,400

C)

Rs.14,847

D)

None of the above

Solution:

Ans: (c)

  

Pyla Siva

· commented

· 1 Months ago

No, above answer is correct. there are two semicircles, so instead of calculating each area he took one full circle area so no need to multiply by 2, if he calculates each semi circle area then we should multiply by 2.
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