Question

If a light flashes every 6 seconds how many times will it flashin 3/4 of an hour

Answer 1

light flashes in every = 6 sec

it in 3/4 of an houre = 15 min

light flashes in one minute = 60 sec. /no of light flashes

= 60/6

= 10

light flashes 10 times in one minute

there fore..

no. of light flashes in 15 min = no. of min × light flashes in one minute

= 15 × 10

= 150 times light flashes in 3/4 of an houre

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