Question

An ant travel around the book once in every 5 min What is ant average spead in cm/sec. ( length = 20 cm and breadth = 15 cm )​

Answer 1

Explanation:

Let us move the mirror to the point Q. Ant is covering a distance of PQ(=60cm) in 2×60s. ∠PQM=30

0

.

From similar triangle we get, ∠MQ

1

P

1

=30

0

Since ∠PQP

1

=60

0

, we get PQ=P

1

Q

1

=PP

1

=60cm

Now, PP

1

=60cm and QQ

1

=0cm.

So, the rate at which the distance between ant and its image change is

2×60

60

cm/s=0.5cm/s

Answer 2

Answer:

hope it's help full for u