##
At what time between 70′ clock and 8 o’clock will the two hands of a clock be at right angles?

21 9/11 minutes past 7**
**

Question

At what time between 70′ clock and 8 o’clock will the two hands of a clock be at right angles?

21 9/11 minutes past 7

54 6/11 minutes past 7

Both (1) and (2)

None of these

in progress
0

Mathematics
2 years
2021-06-30T09:45:56+00:00
2021-06-30T09:45:56+00:00 1 Answers
0 views
0
## Answers ( )

Answer:There are two cases

Case I : When they are in opposite directions i.e. 30 min spaces apart

At 8 o’clock they are 40 minute spaces apart

To be in opposite directions minute hand will have to gain 40 – 30 = 10 min spaces

Now 10 minute spaces will be gained in

6055×10=1010116055×10=101011 minute

Hence hand will be in opposite