22nd answer is the question

if the radio is sold for rupees 3445 gain percent will be 6%

Step-by-step explanation:

let x be the CP of radio

SP-

100-loss%/100×CP

3120=100-4/100×x

3120=96x/100

x=3120×100/96

so, CP of radio is 3250

new SP= 3445

since SP>CP it will be a case of gain

Gain=SP-CP

3445-3250= Rs 195

Gain%=Gain×100/CP

=195×100/3250

=6%

24+x=y

step-by-step explanation:

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour