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

Given:

The mass of a dolphin is a quarter the mass of a seal, if the seal is 126kg heavier than the dolphin

To find:

The total mass of dolphin and seal

Solution:

Let,

"D" → represents the mass of the Dolphin

"S" → represents the mass of the Seal

The mass of dolphin is quarter the mass of seal

i.e., $D = \frac{3}{4} \times S$ . . . . (1)

The Seal is 126kg heavier than Dolphin

i.e., $S = D + 126$

on substituting from equation (1), we get

$\implies S = \frac{3S}{4} + 126$

$\implies S - \frac{3S}{4} = 126$

$\implies \frac{4S - 3S}{4} = 126$

$\implies \frac{S}{4} = 126$

$\implies S = 126 \times 4$

$\implies \bold{S = 504}$

On substituting the value of S in equation (1), we get

$\bold{D} = \frac{3}{4} \times 504 = \bold{378}$

Now,

The total mass of Dolphin and Seal is,

= D + S

= 378 kg + 504 kg

= 882 kg

Thus, the total mass of dolphin and seal is → 882 kg.

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Answer 2

Answer:

210

Step-by-step explanation:

Seal is 3 quarters heavier than the dolphin. The seal is 126kg over the dolphin so divide by 3 = 42. 42 x 4 = 168 which is the seals weight. 168 (seals weight) + 42 (dolphins weight) = 210