Question

on increasing the diameter of a circle by 40%, its area will be increased by ​

Answer 1

Answer:

let it radius be =x

Step-by-step explanation:

40%of x

then x÷100×40

area of circle at radius x= 22÷7 ×x×x (1)

area of circle 40%increase = 22÷7 ×x÷100×40×x÷100×40 (2)

then subtract (2)-(1)