261. A rectangular park, 70m * 30m has two roads which are 5m wide one parallel to its length and the other to its breadth. How much will it costs to gravel the roads at Rs. 4 per sq.m?
Answer: RS 1,900
Explanation:Area of road parallel to the length = 70*5 = 350 sq.m.
Area of road parallel to the breadth = 30*5 = 150 sq.m.
Total area of road = 350+150 = 500 sq.m.
As these two road contains common area of 5*5 = 25 sq.m.,
so subtract once this common area, so actual area of road = 500-25 = 475
Cost to gravel @ 4 Rs./sq.m.= 475*4 = 1900 Rs.
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262. Martha is 4 times the age of her daughter,Lyndra 4 years ago she was 8 times her daughters age,after how may years will martha be twice lyndra's age
Answer: 14 Year
Explanation:Let m and l be the present ages of Martha and Lyndra
Then m = 4l
4 years ago (m-4) = 8(l-4)
m = 8l-28
Equate "m"
4l = 8l - 28
4l = 28
l = 7
m = 28
After x years , Martha will be twice of Lyndra
(m+x) = 2(l+x)
28+x = 2*7+2x
28+x = 14+2x
x = 14
S,o after 14 years martha and lyndra ages will be 42 and 21
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263. [ 2/9 + 2/3 ]*2 1/4+5/6*5/12
Answer: 1
Explanation:[2+6 /9]*9/4 divide 5/6 * 5/12
8/9 *9/4 divide 5/6 *5/12
8/9 * 9/4 * 6/5 * 5/12=1
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264. A car is 15 minutes late by running at a speed of 4/5th of its actual speed. The actual time taken by the car to cover that distance is
Answer: 1 hour
Explanation:Here is no explanation for this answer
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265. How many Kg of sugar must be added to 30 Kg of 2% solution of sugar and water to increase it to a 10% solution ?
Answer: 2.6Kg
Explanation:Here is no explanation for this answer
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266. How much water must be added to 60 litres of milk at 1.5 litres for Rs. 20 So as to have a mixture worth Rs.32/3 a litre?
Answer: 15 litres
Explanation:Here is no explanation for this answer
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267. A boy standing idle sounds a whistle to his friend at a distance of 1200 m moving away from him in a speeding car at 108 kmph. Find the duration (seconds) after which his friend is going to hear him. (Speedof sound = 330m/sec).
Answer: 4
Explanation:Here is no explanation for this answer
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268. Six years ago I was three times as old as my brother, and now I am twice as old my brother. Find my brother’s age (years).
Answer: 12
Explanation:Here is no explanation for this answer
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269. An article costing Rs.160 is sold at 15% discount on a mark-up price. What is the selling price after discount?
Answer: 170
Explanation:Here is no explanation for this answer
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270. Ramesh, Ram, Kareem and Mohan collected coins of different countries. They collected 100 together. None collected less than 10. Each collected an even number. Each collected a different number. Based on these, we can say that the number of coins collected by the boy who collected the most could not have exceeded?
Answer: 64
Explanation:Here is no explanation for this answer
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