Question

Find the cost price if SP= rs 21 and gain = rs 5%

Answer 1

Answer:

Step-by-step explanation:

Co= gain % of sp+ sp

= 21×5/100 +21= 22.05 RS

Answer 2

Answer:

Cost price = ₹20

Step-by-step explanation:

Formula :-

C.P. = sp×100/(100+gain)

S.P. = ₹21

Gain (%) = 5%

C.P. = 21×100/(100+5)

= 21×100 /105

= 21×20/21

= 20