Have a query? Ask a Tutor!!

Access to best educators and exclusive paper discussions

Offsite Campus Turito Championship

Can’t find what you’re looking for?

Our tutors are from top schools around the world, and they are waiting for you 24/7, anytime, anywhere.

Homework- One to One Solutions
Understand concepts to solve better
Get your doubts solved instantly

Mathematics

Grade9

Easy

Question

Find the perimeter of sector whose area is 324 square cm and the radius is 27 cm.

78 cm
86 cm
63 cm
69 cm

hint Hint:

$A equals pi r to the power of 2 end exponent$
Circumference = 2× $pi$ ×r

The correct answer is: 78 cm

Area of sector $equals 324 text end text c m to the power of 2 end exponent$
$fraction numerator r l over denominator 2 end fraction equals 324$
Multiply each side by 2.
$r l equals 648$
Substitute 27 for r.
$27 I equals 648$
Divide each side by 27 .
I=24cm
Perimeter of sector is
=I+2r
=24+2(27)
=24+54
=78 cm

Related Questions to study

card img

With Turito Academy.

card img

With Turito Foundation.

card img

Get an Expert Advice From Turito.

Turito Academy

card img

With Turito Academy.

Test Prep

card img

With Turito Foundation.