Question

if 10ab=40 and b=1, then find the value of a?
i.4
ii.2
iii.6
iv.40​

Answer 1

Answer:

10*a*b = 40

==> a*b=(40/10)

==> a*(1)=4     [since b=1]

==> therefore a=4

Hence option (i) 4 is correct

Answer 2

Answer:

10 x a x b=40

10 x a x 1=40. (b=1)

10 x a=40/1 i.e. 10 x a=40

a=40/10

a=4/1

a=4