wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The radius of a circular pond is 7 m. What will be the total cost to pave a circular path of width 7m around the pond at the rate of Rs.10 per m2

A
Rs. 4620
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Rs. 2840
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Rs. 2110
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Rs. 3250
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Rs. 4620
As you can see, the pathway around the pond forms an outer circle with radius 14 m.
Area of the pathway = π( R2 - r2 )
Here, R =14 m and r = 7 m
π( R2 - r2 ) =227( 142 - 72 )
= 227(19649)
=227×147
=22×21
=462m2
Total cost = 462×10 = Rs. 4620

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Introduction to Integers
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon