Question

A school is located between two cliffs. When the metal bell is struck by school attendant, first echo
is heard by him after 2.4 s and second echo follows after 2.0 s for him at the same position near the
bell. If the velocity of sound in air is 340 ms at the temperature of the surroundings, then the
distance between the cliffs is approximately
(a) 0.488 km
(b) 0.751 km
(c) 7.16 km
(d) 1.41 km​

Answer 1

Answer:

0.751km

Explanation:

velocity v=340m/s

total time=4.4s

distance d=v*t/2

d=748m=0.748km

The answer is option b