1. 10 metres of cloth cost 1000 Rs. What will be the cost for 4 metres (a) 400 rs
(b) 800 rs
(c) 200 rs
(d)100. rs ​

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%