Question

If apples are bought at 11 for RS 10 & sold at 10 for RS 11, how much
will be the gain %?
a) 5%
b) 4%
c) 3%
d) 2%
31 Viral can do a piece of work in 10 days & Raja in 15days. If both of them
work together how long will it take to finish the work?
a) 6days
b) 5days
c) 7days
d) 8days​

Answer 1

Step-by-step explanation:

1)Cost of 11 apples = Rs.10/-

Selling Price of 11 apples

=11/10*11

=121/10

Therefore, Profit = 121/10 - 10

                           = 21/10 gain %

                           = 21/10 / 10 * 100

                           = 21/100 × 100

                           = 21 % Profit

2) Let us take x = Time it will take for both of them

Then,

x(1/10 + 1/15) = 1

x(15 + 10) = 150

x(25) = 150

x = 6 days

please mark me brainliest