Question

The mass of dolphin is quarter the mass of seal, if seal is 126kg heavier than dolphin then what is the total mass of dolphin and seal?​

Answer 1

210kg

Explanation:

let d = dolphin's mass and s = seal's mass

d = s/4

s = 126 + d

s = 126 + s/4

s - s/4 = 126

3s = 504

s = 168

d = s/4

d = 168/4

d = 42

s + d = total mass

168 + 42 = 210