Question

The duration of a railway journey varies as the dis-
tance and inversely as the velocity, the velocity var-
ies directly as the square root of the quantity of coal
used, and inversely as the number carriages in the
train. In a journey of 50 km in half an hour with
18 carriages, 100 kg of coal is required. How much
coal will be consumed in a journey of 42 km in 28
minutes with 16 carriages.
(explain in detail)
(a) 64 kg
(b) 49 kg
(c) 25 kg
(d) 36 kg​

Answer 1

Answer:

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