Question

hey friends
answer every question except the lined ones

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show full method

(if having notebook plz write the answers on it .It will help me to understand better.)

Answer 1

21.) 10% discount on machine worth 200 each

10% of 200 = 20

so, price of each machine= 200-20=180

he can buy 72 machine worth of 200 so he has total rupees= 200×72=14400

no. of machine = 14400/180= 80 machine

22.) length of train= 100m

velocity= 72 km/hr = 20 m/s

time=25s

distance covered by train = v×t

= 20×25

= 500m

Length of bridge = 500-100=400m

24.) total price of scooter for Ram = 4700+800

= 5500

he sells the scooter in 5830Rs.

total profit= 5800-5500

=330

in % =(330/5500)×100= 6%