Question

Q1. a man runs at the speed of 10 km/hr . how much time will he take to cover 750 metres?

Q2. a convex lens converges ( bends inwards ) the light falling on it, therefore it is called a ___________ lens .

Q3. express each of the following speeds in metres per second :
1) 36 km per hour
2) 72 km per hour


Q4. express each of the following speeds in km per hour:
1) 900 m per minute
2) 45 m per second



plzz amswer this

Answer 1

1.ans.
750 meters=0.75 km
therefore,
0.75/10
=0.075 hr
0.075*60
=4.500
=4.5 min.

2.ans.
converging lens


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