Question

An aeroplane covers a certain distance at a speed of 240 km/hr in 5 hours. To cover
double the distance in 10 minutes, it must travel at a speed of
(A)2400 Km/hr
(B) 14400 Km/hr
(C)17000 Km/hr
(D)360 Km/h​

Answer 1

•Ғɪʀsᴛ ᴋɴᴏᴡ ғᴏʀᴍᴜʟᴀs:-

distance=speed × time

speed=distance/time

time=speed/distance

• ɢɪᴠᴇɴ:-

aeroplance covers distance of 240 km/hr in 5 hours so we need the total distance of 5 hours...

•sᴏʟᴜᴛɪᴏɴ:-

distance=speed×time so, distance=240×5=1200km

now , speed cover in 1+2/3 hours=5/3 hours

speed=distance/time speed=(1200/5/3)kmph

=(1200×3/5)kmph

=720 kmph