Question

If 15 boys earn rs. 900 in 5 days, how much will 20 boys earn in 7 days

Answer 1

Hi.

Here is your answer---

Given conditions -

For first case---

Number of boys ( n1) = 15 boys

Money earns(m1) = Rs. 900
             
 Time(t1) = 5 days.


For second case---

Number of boys(n2)= 20 boys

Money earns(m2) = m2

Time(t2) = 7 days.


Using the formula,

                     n1 x m1 x t1 = n2 x m2 x  t2
                   
                     15 x 900 x 5 = 20 x m2 x 7
                         140 x m2 = 67500
                                m2 = 67500/140
                                m2 =  Rs. 3375/7
                          ---------------------------------

Thus, money earns by the 20 boys in 7 days is Rs. 3375/7 or Rs. 482.14.
                                                                              -------------------------------------
Hope it helps.

Have a nice day.

Answer 2

Answer: Rs.1680

Step-by-step explanation:

15 boys earn Rs.900 in 5 days

then in 1 day , 1 boy can earn = 900/(5*15) =12

so, 20 boys can earn in 7 days will be = 12*7*20 = 1680

Answer : Rs.1680