Question

If 90% of x is 315 km then the value of x is what

Answer 1

Answer:

solution

90÷100 × x = 315

by calculating ,

0.9x = 315

∴ x = 315÷ 0.9

∴x = 350 ans

Answer 2

I am using S.I. method !!

p=315

r=90

t=x

S.I. = PXRXT/100

= 315x90xX / 100

now cut 1 zero from 100 and make it 10 ; now cut the zero in 90 and make it 9 ; now cut 10 from 315 to make 31.5 x 9 x X

SO ,

X = 31.5 x 9

  = 283.5

thank you !!