117) A truck travelled 420 km in 12 hours. How
much time will it take to cover 630 km?
18) If it takes 3 hours 20 minutes to paint 5
chairs, how long will it take to paint 8
chairs?
19) If 348 g sugar is needed to make 12
d gulab jamuns, how much sugar is
needed to make 20 gulab jamuns?
20) If 5 copies of a book weigh 2.1 kg, how
much will 12 copies of the book weigh?
Answers
Answer:
17) 12 hours for 420 km
x = 630 km
x = 420/630×126
= 18
= so, 18 hours for 630 km
18) 3 hours =180 minutes
So 180+20 =200 minutes
Paint five chairs in 200 minutes
So one chair Paint in 200/5 minutes
200/5= 40 minutes
So 8 chairs Paint in 40 × 8 = 320 minutes
19) since 348g required to make 12 gulab jamun
so for 1 gulab jamun the required amount of sugar is 348/12= 29
now for 20 gulab jamun
>>>20×29=580
Answer:
17) Distance covered in 12 hrs. = 420 km....
Speed = 35 km/h
Therefore, to cover 630 km,it will take 18 hrs.........
18) Time taken to paint 5 chairs = 3 hr 20 min = 200 min....
Therefore, time taken to paint 8 chairs = 200 * 8 / 5 = 320 mins
= 5 hr 20 min....
19) Sugar taken to make 12 gulab jamuns = 348 g
Therefore, Sugar taken to make 20 gulab jamuns = 348 * 20 / 12
= 580 g.......
20) Weight of 5 copies = 2100 g = 2.1 kg
Therefore, weight of 12 copies = 2100 g * 12 / 5 = 5040 g
= 5.04 kg.......
HOPE THIS HELPED.....
PLZ MARK AS BRAINLIEST............