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A fence is to be erected around a circular field the cost of fencing comes to rupees 2640 @ rupees 12 per metre find the radius of the circular field Student circumference of circle * cost per meter = 2640 2* pi * r * 12 = 2640 r = 2640 / (2*12*pi) r = 35 meter Student

My is coming 3.5 how? Student

Oh sorry it is right Student

Thank you okay any other questions? Student

A piece of thin wire is in form of an equilateral triangle of side 8.8 DM is bent into a circle with no loss in wire find the diameter of the circle Student please send image of complete question Student Student

The circled ones Student okay for 10th question proceed like this (pi*D)/2 + D = 108 now solve for D you will get D = 42 cm Student

Yes Student

Next one   Student

Thanks Student

The last one for last one r = 11 cm so in 1 hour the minute hand will complete 1 circle so calculate circumference C = 2*pi*r = 2*3.14*11 for 2 hours multiply C by 2 so you'll get C = 138.16 cm

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