# CBSE Class 10 Answered

**Hello sir, please explain the questions that follow: 1) Find the width of the race track which is of a ring shape if the inner circumference is 528m and the outer circumference is 616m. 2) A wire is in the form of a square of side121cm.It is cut and made into the shape of a circle.Find the diameter of the circle. 3) a wire is in the form of a triangle of sides 28cm,26cm and 30cm.The wire is cut and made into a circle.Will the area of the circle be the same as that of the triangle? Thank You.**

Asked by seeni2005 | 20 Nov, 2019, 10:10: PM

Expert Answer

1)

Circumference of big circle = 616 m

2πr = 616

r = 616 × 7/22 = 14 × 7 = 98 m

Circumference of small circle = 528 m

2πr = 528

πr = 528 × 7/22 = 12 × 7 = 84

width of the track

= Radius of big circle - radius of small circle

= 98 - 84 = 14 m

Circumference of small circle = 528 m

2πr = 528

πr = 528 × 7/22 = 12 × 7 = 84

width of the track

= Radius of big circle - radius of small circle

= 98 - 84 = 14 m

Answered by Sneha shidid | 21 Nov, 2019, 08:46: AM

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