Question

214. The length and breadth of a rectangular park are in the ratio of 5:3. If the perimeter is 480 m.
find its area
215. The angles of a triangle are in the ratio 3:4:5. Find the measure of each angle of a triangle
1 The income of Mr Lal is 42.500 per month. The ratio of income to expenditure is 5:3. Find the
savings of Mr. Lal
217. Karan earns 38.000 per month. His monthly expenditure is 18.000. Find the ratio of
ta) his income to his savings. b) his income to his expenditure.
18. Train A covers a distance of 280 km in an hour and train B covers a distance of 180 km in an hour.
Distance
Find the ratio of the speed of train A to train B. Hint: Speed
Time
119. A train covers a distance of 250 km in 2 hours and an aeroplane coves a distance of 750 km in
Distance
3 hours. Find the ratio of the speed of train to aeroplane. Hint: Speed
Time
20) Rajesh starts for office at 9:00a.m. and comes back home at 8:30 pm. He reaches his office bu
10:00 am and leaves by 7:30 pm. His travelling time is 120 minutes. Find the ratio of travelling
time to total time period in office​

Answer 1

The perimeter is given by twice the sum of length and breadth.

The length and breadth are on ratio 5:3.Let the common ratio be x.

length = 5x

breadth = 3x

Perimeter = 2(length + breadth)

480 = 2(5x + 3x)

480 = 16x

x=30

length = 5x=5*30 = 150

breadth = 3x = 3*30 =90

Area = length * breadth

Area = 150 * 90

Area = 13500 sq. m

Answer 2

Answer:

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