ICSE Class 10 Physics 2014 Solved Paper

Question : 48

Total: 66

A radar sends a signal to an aircraft at a distance of 30‌km away and receives it back after 2×10−4 second. What is the speed of the signal ?

Solution:

Given :
Distance of aircraft =30‌km=30,000m
Total distance =2×30,000=60,000m
Time taken =2×10−4 second
Hence Speed of signal (V)
‌=‌

‌ Total distance travelled ‌(2d)

‌ time taken ‌(t)

‌=‌

60,000

2×10−4

=30,000×104m∕ s
‌=3×108m∕ s

Go to Question:

Prev Question

Next Question