ashish
Last Activity: 7 Years ago
Dear jitender
as density =mass/volume
mass =density *volume
we have R=row*l/a
by multiplying l in numerator and in denominator
we get R=row*l2/al => R=row *l2/V (V=volume) and (al=volume)
so V=row*l2/R put this into formula=> mass = dR /row*l2