RD sharma- Exercise 20.1- Quesiton 19. Solution is incorrect. In question, circumferance is given as 10 m. But the solution you have provided has circumferance as 44 m. And then in next step, its mentioned 2 pie r = 10m. r = (10*7)/ (2*22) = 7 m. This is incorrect.
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you are right
circumference=2.pi.r
44m= 2 x 22/7 x r
r=44/(44/7)=44 x 7/44=7m
circumference=2.pi.r
44m= 2 x 22/7 x r
r=44/(44/7)=44 x 7/44=7m
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