Question

Rhombus whose perimeter is 32 M and whose one diagonal is 10 M long is printed on both side @ 5
rupees per metre square find the cost of painting

Answer 1

in rhombus ABCD
diagonal=10m
perimeter=32m
4*side=32m
side=32/4=8m
each side = 8m
Area of triangle ABCD
side=8m,8m,10m
perimeter = 8m+8m+10m= 26m
 
let 's' be the semi-perimeter of triangle ABCD
s=26m/2=13m