CHIMA

A CIRCULAR PIECE OF CARDBOARD IS TRIMMEM IN SUCH A WAY THAT ITS CIRCUMFERENCE IS REDUCED IN THE RATIO 3:7. IN WHAT RATIO IS THE SURFACE AREA REDUCED?

First of all convert 54cm to m 1m=100cm, therefore 54cm=0.54m=h. then using equation of a motion v^2=u^+2gh,since u =0 g=10 the equation bcoms v^2=2gh then substitute and solve for v ans=32.9

calculator still boothin

Total =106 (Sample space) Women=23 p(w)=r/n=23/106

Speed=distance(km)/time(mins)

3X+7Y+5=0.,..,..,.,..(1) 4X-3Y-8=0..,,..,.,...,..(2) From (1) x=(-5-7y)/3..,..,..(3) put into equ (2) for x ; (-20-28y)/3-8=0 ; y=31/28=1.1 put into equ 3 for y x=(-5-7.7)/3=-4.2 -4.2p +1.1-1=0 ; p=-0.1/-4.2 p=0.024

DUde 1 of u question has been solve check it out it is similiar

SIMPLE

I DONT UNDERSTAND?