Question

Radius of circular base of ear of corn is 6.6 cm and its length is 11.2 cm ,if on average 1 sq cm area contain 2 corn kernels, find the total number of kernels on corn.

Answer 1

Answer:

539 kernels

Step-by-step explanation:

Surface area of corn = πrl

Now, l = square root of ( r² + h² )

i.e.= √( 6.6² + 11.2² )

= √( 43.56 + 125.44 )

= √169 = 13 cm

So, surface area of corn= 22/7 × 6.6 × 13

= 269.657 cm²

Given, 1 cm² covers = 2 kernels  

Then 269.7 cm² will cover = 269.657× 2 = 539.314 kernels  

Therefore, corn contains approx. 539 kernels.