Question

Cospower6 minus sinpower6

Answer 1

my answer hope this will help you......

 

The correct answer was given

answer:

16

step-by-step explanation:

$\sqrt{248 + \sqrt{51 + \sqrt{169} } }$

now √248 + √51+13

= √(248 + √64)

= √(248 + 8)

= √(256) = 16

speed of the train in metres/sec = 72000/3600 = 20

distance travelled by train to cross the platform = 30 * 20 = 600

= length of train + length of platform

distance travelled by train to cross the man

= 18 * 20 = 360 = length of train

length of platform = 600 - 360 = 240