Question

Weight of m, d and i is 74. Sum of d and i is 46 greater than m. I is 60% less than

d. What is d's weight.

Answer 1

Answer:

d = 54.4

Step-by-step explanation:

m + d + i = 74, d + i = 46 + m and i = m -  60% of m

d + i = 46 + m

-m +  d + i = 46 ................... (ii)

m + d + i = 74....................(i)

(m + d  + i ) - (-m + d + i ) = 74 - 46

m + d + i + m - d - i = 28

2m = 28

m = 28/2 = 14

i = m - 60% of m = 14 - (60/100 * 14) = 14 - 8.4 = 5.6

putting value of m and i in eq (i)

m + d + i = 74

14 + d + 5.6 = 74

d = 74 - 14 -5.6

d = 54.4